NETGEAR DG834GT User Manual

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

NETGEAR, Inc.

4500 Great America Parkway Santa Clara, CA 95054 USA Phone 1-888-NETGEAR

202-10053-01 REFGD August 2004

August 2004

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Trademarks

NETGEAR is a trademark of Netgear, Inc. Microsoft, Windows, and Wi ndow s NT are registered trademar ks of Microsoft Corporation. Other brand and product names are registered trademarks or trademarks of their respective holders.

Statement of Conditions

In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice.

NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.

Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruct ions, may cause harmf ul interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Federal Communications Commission (FCC) Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. In order to avoid the possibility of exceeding the FCC radio frequency exposure limits, human proximity to the antenna shall not be less than 20 cm (8 inches) during normal operation.

EN 55 022 Declaration of Conformance

This is to certify that the DG834GT 108 Mbps Super Wireless ADSL Router is shielded against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by the application of EN 55 022 Class B (CISPR 22).

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Bestätigung des Herstellers/Importeurs

Es wird hiermit bestätigt, daß das DG834GT 108 Mbps Super Wireless ADSL Router gemäß der im BMPT-AmtsblVfg 243/1991 und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.

Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.

Certificate of the Manufacturer/Importer

It is hereby certified that the DG834G T 108 Mbps Super W ireless ADSL Router has been suppressed in accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations may, however, be subject to certain restrictions. Please refer to the notes in the operating instructions.

Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations.

Voluntary Control Council for Interference (VCCI) Statement

This equipment is in the second category (information equipment to be used in a residential area or an adjacent area thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Data Processing Equipment and Electronic Office Machines aimed at preventing radio interference in such residential areas.

When used near a radio or TV receiver , it may become the cause of radio interference. Read instructions for correct handling.

Customer Support

Refer to the Support Information Card that shipped with your DG834GT 108 Mbps Super Wireless ADSL Router.

World Wide Web

NETGEAR maintains a World Wide Web home page that you can access at the universal resource locator (URL) http://www.netgear.com. A direct connection to the Internet and a Web browser such as Internet Explorer or Netscape are required.

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Chapter 1 About This Guide

Audience, Conventions, Scope ......................................................................................1-1

How to Use this Manual ..................................................................................................1-2

How to Print this Manual .................................................................................................1-3

Chapter 2 Introduction

About the Router ............................................................................................................2-1

Key Features ..................................................................................................................2-2

802.11g Wireless Networking ...................................................................................2-2

A Powerful, True Firewall .........................................................................................2-3

Easy Installation and Management ..........................................................................2-3

Protocol Support ......................................................................................................2-4

Content Filtering .......................................................................................................2-5

Auto Sensing and Auto Uplink™ LAN Ethernet Connections ..................................2-5

What’s in the Box? ..........................................................................................................2-6

The Router’s Front Panel .........................................................................................2-6

The Router’s Rear Panel .........................................................................................2-8

Chapter 3 Connecting the Router to the Internet

What You Need Before You Begin ..................................................................................3-1

ADSL Microfilter Requirements ................................................................................3-1

ADSL Microfilter .................................................................................................3-1

ADSL Microfilter with Built-In Splitter .................................................................3-2

Ethernet Cabling Requirements ............................................................................... 3-2

Computer Hardware Requirements .........................................................................3-2

LAN Configuration Requirements ............................................................................3-2

Internet Configuration Requirements ....................................................................... 3-3

Where Do I Get the Internet Configuration Parameters? ............................. ............3-3

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Record Your Internet Connection Information ..........................................................3-3

Connecting the DG834GT to Your LAN .... .... ... ... ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ..3-5

How to Connect the Router ......................................................................................3-5

Auto-Detecting Your Internet Connection Type ............................................................3-10

Wizard-Detected PPPoE Login Account Setup ............ ....... ...... ....... ...... ...... ....... ...3-11

Wizard-Detected PPPoA Login Account Setup ............ ....... ...... ....... ...... ...... ....... ...3-12

Wizard-Detected Dynamic IP Account Setup .........................................................3-12

Wizard-Detected IP Over ATM Account Setup ......................................................3-13

Wizard-Detected Fixed IP (Static) Account Setup ........................................ ..........3-14

Testing Your Internet Connection ..................................................................................3-15

Manually Configuring Your Internet Connection ........................................................ ...3-15

How to Perform Manual Configuration ...................................................................3-16

Internet Connection Requires Login and Uses PPPoE ...................................3-17

Internet Connection Requires Login and Uses PPPoA ...................................3-18

Internet Connection Does Note Require A Login ............................................3-19

ADSL Settings ........................................................................................................3-20

Chapter 4 Wireless Configuration

Considerations for a Wireless Network ..........................................................................4-1

Observe Performance, Placement, and Range Guidelines ......... .... ... ... ... ...............4-1

Implement Appropriate Wireless Security ................................................................4-2

Understanding Wireless Settings ...................................................................................4-3

How to Set Up and Test Basic Wireless Connectivity ..............................................4-7

How to Restricting Wireless Access to Your Network ..............................................4-8

Restricting Access to Your Network by Turning Off Wireless Connectivity ........4-9

Restricting Wireless Access Based on the Wireless Network Name (SSID) .....4-9

Restricting Wireless Access Based on the Wireless Station Access List ..........4-9

Choosing WEP Authentication and Security Encryption Methods .........................4-11

Authentication Type Selection ......................................................................... 4-11

Encryption Choices ..........................................................................................4-12

How to Configure WEP ..........................................................................................4-13

How to Configure WPA-PSK ..................................................................................4-14

Chapter 5 Protecting Your Network

Protecting Access to Your DG834GT 108 Mbps Super Wireless ADSL Router ............. 5-1

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How to Change the Built-In Password .....................................................................5-1

Changing the Administrator Login Timeout ..............................................................5-2

Configuring Basic Firewall Services ...............................................................................5-2

Blocking Keywords, Sites, and Services ......... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ..5-3

How to Block Keywords and Sites ...........................................................................5-3

Firewall Rules .................................................................................................................5-5

Inbound Rules (Port Forwarding) .............................. ............................................... 5-6

Inbound Rule Example: A Local Public Web Server ..........................................5-6

Inbound Rule Example: Allowing Videoconferencing ........................................ 5-8

Considerations for Inbound Rules .....................................................................5-9

Outbound Rules (Service Blocking) .........................................................................5-9

Outbound Rule Example: Blocking Instant Messenger ...................................5-10

Order of Precedence for Rules ..............................................................................5-11

Services ................................. ................................................ .......................................5-12

How to Define Services ..........................................................................................5-13

Setting Times and Scheduling Firewall Services ................................................ .......... 5-14

How to Set Your Time Zone ...................................................................................5-14

How to Schedule Firewall Services ........................................................................5-15

Chapter 6 Managing Your Network

Backing Up, Restoring, or Erasing Your Settings ...........................................................6-1

How to Back Up the Configuration to a File ............................................................. 6-1

How to Restore the Configuration from a File .............................. ............................6-2

How to Erase the Configuration ...............................................................................6-2

Upgrading the Router’s Firmware .................... ......... .......... .......... .......... ......... .......... .....6-2

How to Upgrade the Router Firmware .....................................................................6-3

Network Management Information .................................................................................6-4

Viewing Router Status and Usage Statistics ............................................................6-4

Viewing Attached Devices ........................................................................................6-9

Viewing, Selecting, and Saving Logged Information ................................................6-9

Selecting What Information to Log ..................................................................6-11

Saving Log Files on a Server ..........................................................................6-12

Examples of Log Messages ...................................................................................6-12

Activation and Administration ..........................................................................6-12

Dropped Packets .............................................................................................6-12

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Enabling Security Event E-mail Notification .................................................................6-13

Running Diagnostic Utilities and Rebooting the Router ................................................6-14

Enabling Remote Management ....................................................................................6-15

Configuring Remote Management .........................................................................6-15

Chapter 7 Advanced Configuration

Configuring Advanced Security ......................................................................................7-1

Setting Up A Default DMZ Server ............................................................................7-1

How to Configure a Default DMZ Server ...........................................................7-2

Connect Automatically, as Required ........................................................................7-3

Disable Port Scan and DOS Protection ...................................................................7-3

Respond to Ping on Internet WAN Port ...................................................................7-3

MTU Size .................................................................................................................7-3

Configuring LAN IP Settings ...........................................................................................7-3

DHCP ................................. .............................................................. ........................7-5

Use Router as DHCP server . .......................................... ... ... .... ... ... ... ... .... ... ..... 7-5

Reserved IP addresses .....................................................................................7-6

How to Configure LAN TCP/IP Settings ...................................................................7-7

Configuring Dynamic DNS .......................................................................................7-7

How to Configure Dynamic DNS ..............................................................................7-8

Using Static Routes ........................................................................................................7-9

Static Route Example ...............................................................................................7-9

How to Configure Static Routes .............................................................................7-10

Chapter 8 Troubleshooting

Basic Functioning ...........................................................................................................8-1

Power LED Not On ...................................................................................................8-2

Test LED Never Turns On or Test LED Stays On .....................................................8-2

LAN or WAN Port LEDs Not On ...............................................................................8-2

Troubleshooting the Web Configuration Interface ..........................................................8-3

Troubleshooting the ISP Connection ..............................................................................8-4

ADSL link .................................................................................................................8-4

WAN LED Blinking Yellow ..................................................................................8-4

WAN LED Off ......................................... ... ... ....................................... ... .... ... ... ..8-4

Obtaining a WAN IP Address .... ... ... .......................................... ... .... ... ... ..................8-5

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Troubleshooting PPPoE or PPPoA .......................................................................... 8-6

Troubleshooting Internet Browsing ..........................................................................8-6

Troubleshooting a TCP/IP Network Using the Ping Utility ..............................................8-7

Testing the LAN Path to Your Router .......................................................................8-7

Testing the Path from Your Computer to a Remote Device .....................................8-8

Restoring the Default Configuration and Password ............... .........................................8-9

Using the Reset button .............................................................................................8-9

Problems with Date and Time .........................................................................................8-9

Appendix A Technical Specifications

Appendix B Network and Routing Basics

Related Publications ...................................................................................................... B-1

Basic Router Concepts .................................................................................................. B-1

What is a Router? ................................................................................................... B-1

Routing Information Protocol ................................................................................... B-2

IP Addresses and the Internet ......................................... .... ... ... ... .... ... ... ... ... .... ... ... . B-2

Netmask .................................... ................................................................ ..............B-4

Subnet Addressing .................................................................................................. B-4

Private IP Addresses ................................. ... ... ... .......................................... ........... B-7

Single IP Address Operation Using NAT ................................................................. B-7

MAC Addresses and Address Resolution Protocol ................................................. B-8

Related Documents ................................................................................................. B-9

Domain Name Server .............................................................................................. B-9

IP Configuration by DHCP ..................... ... ... ... ... .... .......................................... ... ... . B-9

Internet Security and Firewalls .................................................................................... B-10

What is a Firewall? ................................................................................................ B-10

Stateful Packet Inspection ............................... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ..... B-10

Denial of Service Attack .........................................................................................B-11

Ethernet Cabling ................................. ... ... .... ... .......................................... ... ... ... .... ... ...B-11

Category 5 Cable Quality .......................................................................................B-11

Inside Twisted Pair Cables .................................................................................... B-12

Uplink Switches, Crossover Cables, and MDI/MDIX Switching ............................ B-13

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Appendix C Preparing Your Network

Preparing Your Computers for TCP/IP Networking ................................ ... ... ... ... .... ... ... . C-1

Configuring Windows 95, 98, and Me for TCP/IP Networking ....................................... C-2

Installing or Verifying Windows Networking Components ... ...... ... .... ... ... ... ... .... ... ... . C-2

Enabling DHCP to Automatically Configure TCP/IP Settings in Windows 95B, 98, and Me C-4

Selecting the Windows’ Internet Access Method .................................................... C-6

Verifying TCP/IP Properties .................................................................................... C-6

Configuring Windows NT4, 2000 or XP for IP Networking ............................................ C-7

Installing or Verifying Windows Networking Components ... ...... ... .... ... ... ... ... .... ... ... . C-7

DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4 ........................... .... ... ... . C-8

DHCP Configuration of TCP/IP in Windows XP ..................................................... C-8

DHCP Configuration of TCP/IP in Windows 2000 ................................................ C-10

DHCP Configuration of TCP/IP in Windows NT4 .................................................. C-13

Verifying TCP/IP Properties for Windows XP, 2000, and NT4 .............................. C-15

Configuring the Macintosh for TCP/IP Networking ...................................................... C-16

MacOS 8.6 or 9.x ................................................... ... ... ... .... ... ... ... .... .....................C-16

MacOS X ...... ... .......................................... .......................................... ..................C-16

Verifying TCP/IP Properties for Macintosh Computers ... .... ... ... ... .... ... ... ... ... .... .....C-17

Verifying the Readiness of Your Internet Account ....................................................... C-18

Are Login Protocols Used? ................................................................................... C-18

What Is Your Configuration Information? ..............................................................C-18

Obtaining ISP Configuration Information for Windows Computers ....................... C-19

Obtaining ISP Configuration Information for Macintosh Computers .....................C-20

Restarting the Network ................................................................................................ C-21

Appendix D Wireless Networking Basics

Wireless Networking Overview .............................. ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ....D-1

Infrastructure Mode .................................................................................................D-1

Ad Hoc Mode (Peer-to-Peer Workgroup) ................................................................ D-2

Network Name: Extended Service Set Identification (ESSID) ................................D-2

Authentication and WEP Data Encryption ..................................................................... D-2

802.11 Authentication ..............................................................................................D-3

Open System Authentication .............................. .... ... ... ... .... ... ... ... .... ....................... D-3

Shared Key Authentication ......................................................................................D-4

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Overview of WEP Parameters ................................................................................ D-5

Key Size .................................................................................................................. D-6

WEP Configuration Options ...................................................... ... .... ... ... .................D-7

Wireless Channels ....................... .... ... ... ... ..................................................................... D-7

WPA Wireless Security ..................................................................................................D-8

How Does WPA Compare to WEP? ........................................................................ D-9

How Does WPA Compare to IEEE 802.11i? ........................................................ D-10

What are the Key Features of WPA Security? ...................................................... D-10

WPA Authentication: Enterprise-level User

Authentication via 802.1x/EAP and RADIUS ..................................................D-12

WPA Data Encryption Key Management ........................................................ D-14

Is WPA Perfect? ..................................................................... ... ... .... ... ... ... ... .... ... .. D-16

Product Support for WPA ......................................................................................D-16

Supporting a Mixture of WPA and WEP Wireless Clients is Discouraged ......D-16

Changes to Wireless Access Points ............................................................... D-16

Changes to Wireless Network Adapters .........................................................D-17

Changes to Wireless Client Programs .......................... ......................... ......... D-18

Glossary

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Chapter 1

About This Guide

Thank you for purchasing the NETGEAR™ DG834GT 108 Mbps Super Wireless ADSL Router.

Audience, Conventions, Scope

This reference manual assumes that the reader has basic-to-intermediate computer and Internet skills. However, basic computer network, Internet, firewall, and networking technology tutorial information is provided in the Appendices.

This guide uses the following typographical conventions:

Table 1. Typographical conventions

italics Emphasis, books, CDs, URL names

bold User input

mono space Screen text, file and server names, extensions, commands, IP addresses

Note: This format is used to highlight information of importance or special interest.

This manual is written for the DG834GT Super Wireless ADSL Router according to these specifications:

Table 1-1. Manual Specifications

Product Version DG834GT 108 Mbps Super Wireless ADSL Router Manual Publication Date August 2004

Note: Product updates are available on the NETGEAR, Inc. Web site at

http://kbserver.netgear.com/DG834GT.asp.

About This Guide 1-1

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

How to Use this Manual

The HTML version of this manual includes these features.

2 3

Figure 1 -1: HTML version of this manual

1. Left pane. Use the left pane to view the Contents, Index, Search, and Favorites tabs.

To view the HTML version of the manual, you must have a version 4 or later browser with JavaScript enabled.

2. Toolbar buttons. Use the toolbar buttons across the top to navigate, print pages, and more.

–The Show in Contents button locates the current topic in the Contents tab.

– Previous/Next buttons display the previous or next topic.

–The PDF button links to a PDF version of the full manual.

–The Print button prints the current topic. Using this button when a step-by-step

procedure is displayed will send the entire procedure to your printer–you do not have to worry about specifying the correct range of pages.

3. Right pane. Use the right pane to view the contents of the manual. Also, each page of the

manual includes a link at the top right which links to a PDF file containing just the currently selected chapter of the manual.

1-2 About This Guide

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

How to Print this Manual

To print this manual you can choose one of the following several options, according to your needs.

• Printing a “How To” Sequence of Steps in the HTML View. Use the Print button on the

upper right of the toolbar to print the currently displayed topic. Using this button when a step-by-step procedure is displayed will send the entire procedure to your printer–you do not have to worry about specifying the correct range of pages.

• Printing a Chapter. Use the link at the top right of any page.

– Click “PDF of This Chapter” link at the top right of any page in the chapter you want to

print. A new browser window opens showing the PDF version of the chapter you were viewing.

– Click the print icon in the upper left of the window. – Tip: If your printer supports printing two pages on a single sheet of paper, you can save

paper and printer ink by selecting this feature.

• Printing the Full Manual. Use the PDF button in the toolbar at the top right of the browser

window. – Click PDF button. A new browser window opens showing the PDF version of the chapter

you were viewing.

– Click the print icon in the upper left of the window. – Tip: If your printer supports printing two pages on a single sheet of paper, you can save

paper and printer ink by selecting this feature.

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

1-4 About This Guide

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Chapter 2

Introduction

This chapter describes the features of the NETGEAR DG834GT 108 Mbps Super Wireless ADSL Router. The DG834G T Super W ireless ADSL Router is a combination of a built-in ADSL modem, router, 4-port switch, firewall, and up to 108 Mbps wireless access point that enables your entire network to safely share an Internet connection that otherwise is used by a single computer.

Note: If you are unfamiliar with networking and routing, refer to Appendix B, “Network

and Routing Basics” to become more familiar with the terms and procedures used in this

manual.

About the Router

The DG834GT 108 Mbps Super Wireless ADSL Router provides continuous, high-speed 10/100 Ethernet access between your Ethernet devices. The DG834GT Super Wireless ADSL Router enables your entire network to share an Internet connection through the built-in ADSL modem that otherwise is used by a single computer. With minimum setup, you can install and use the router within minutes.

The DG834GT Super W ireless ADSL Router provides multiple Web content filtering options, plus e-mail browsing activity, reporting, and instant alerts. Parents and network administrators can establish restricted access policies based on time of day, Web site addresses, and address keywords. They can also share high-speed ADSL Internet access for up to 253 personal computers. The included firewall and Network Address Translation (NAT) features protect you from hackers.

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Key Features

The DG834GT Super Wireless ADSL Router provides the following features:

• 802.11g wireless networking, with the ability to operate in Auto 108 Mbps mode, 108 Mbps “turbo-g” only, the 802.11b+g modes, 802.11g-only, and 802.11b-only.

• A built-in ADSL modem

• A powerful, true firewall

• Easy, Web-based setup for installation and management

• Extensive Internet protocol support

• Content filtering

• Auto Sensing and Auto Uplink™ LAN Ethernet connections

These features are discussed below.

802.11g Wireless Networking

The DG834GT Super Wireless ADSL Router includes an 802.1 1g wireless access point, providing continuous, high-speed 54 Mbps access between your wireless and Ethernet devices. The access point provides:

• 802.11g wireless networking at up to 108 Mbps.

• 802.11g wireless networking, with the ability to operate in the following modes, thus providing backwards compatibility with 802.11b devices or dedicating the wireless network to the higher bandwidth 802.11g or 108 Mbps only devices:

— Auto 108 Mbps mode (i.e., all 802.11g, 802.11b, and Netgear 108 Mbps wireless stations

can be used; this mode is the second fastest mode)

— 108 Mbps only (fastest)

Note: Only use the 108 Mbps only mode when all wireless adapters in your open network

bear the 108 Mbps logo.

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Figure 2-1: 108 Mbps Logo

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

— 802.11b+g modes — 802.11g-only — 802.11b-only

• 64-bit and 128-bit WEP encryption security.

• WEP keys can be generated manually or by passphrase.

• Wireless access can be restricted by MAC address.

• Wireless network name broadcast can be turned off so that only devices that have the network name (SSID) can connect.

A Powerful, True Firewall

Unlike simple Internet sharing NAT routers, the DG834GT is a true firewall, using stateful packet inspection to defend against hacker attacks. Its firewall features include:

• Denial of Service (DoS) protection Automatically detects and thwarts Denial of Service (DoS) attacks such as Ping of Death, SYN Flood, LAND Attack and IP Spoofing.

• Blocks unwanted traffic from the Internet to your LAN.

• Blocks access from your LAN to Internet locations or services that you specify as off-limits.

• Logs security incidents The DG834GT will log security events such as blocked incoming traffic, port scans, attacks, and administrator logins. You can configure the router to email the log to you at specified intervals. You can also configure the router to send immediate alert messages to your email address or email pager whenever a significant event occurs.

Easy Installation and Management

You can install, configure, and operate the DG834GT within minutes after connecting it to the network. The following features simplify installation and management tasks:

• Browser-based management Browser-based configuration allows you to easily configure your router from almost any type of personal computer, such as Windows, Macintosh, or Linux. A user-friendly Setup W izard is provided and online help documentation is built into the browser-based Web Management Interface.

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• Smart Wizard The router automatically senses the type of Internet connection, asking you only for the information required for your type of ISP account.

• Remote management The router allows you to log in to the Web management interface from a remote location via the Internet. For security, you can limit remote management access to a specified remote IP address or range of addresses, and you can choose a nonstandard port number.

• Diagnostic functions The router incorporates built-in diagnostic functions such as Ping, DNS lookup, and remote reboot. These functions allow you to test Internet connectivity and reboot the router. You can use these diagnostic functions directly from the DG834GT when you are connected on the LAN or when you are connected over the Internet via the remote management function.

• Visual monitoring The router’s front panel LEDs provide an easy way to monitor its status and activity.

• Flash erasable programmable read-only memory (EPROM) for firmware upgrades.

Protocol Support

The DG834GT supports Transmission Control Protocol/Internet Protocol (TCP/IP) and Routing Information Protocol (RIP). Appendix B, “Network and Routing Basics” provides further information on TCP/IP.

• The Ability to Enable or Disable IP Address Sharing by NAT The DG834GT allows several networked PCs to share an Internet account using only a single IP address, which may be statically or dynamically assigned by your Internet service provider (ISP). This technique, known as Network Address Translation (NAT), allows the use of an inexpensive single-user ISP account. This feature can also be turned off comp let ely while using the DG834GT if you want to manage the IP address scheme yourself.

• Automatic Configuration of Attached PCs by DHCP The DG834GT dynamically assigns network configuration information, including IP, router, and domain name server (DNS) addresses, to attached PCs on the LAN using the Dynamic Host Configuration Protocol (DHCP). This feature greatly simplifies configuration of PCs on your local network.

• DNS Proxy When DHCP is enabled and no DNS addresses are specified, the router provides its own address as a DNS server to the attached PCs. The router obtains actual DNS addresses from the ISP during connection setup and forwards DNS requests from the LAN.

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• Classical IP (RFC 1577) Some Internet service providers, in Europe for example, use Classical IP in their ADSL services. In such cases, the router is able to use the Classical IP address from the ISP.

• PPP over Ethernet (PPPoE) PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an ADSL connection by simulating a dial-up connection. This feature eliminates the need to run a login program such as EnterNet or WinPOET on your computer.

• PPP over ATM (PPPoA) PPP over ATM is a protocol for connecting remote hosts to the Internet over an ADSL connection by simulating an ATM connection.

• Dynamic DNS Dynamic DNS services allow remote users to find your network using a domain name when your IP address is not permanently assigned. The router contains a client that can connect to many popular Dynamic DNS services to register your dynamic IP address.

• Universal Plug and Play (UPnP) UPnP is a networking architecture that provides compatibility between networking technologies. UPnP compliant routers provide broadband users at home and small businesses with a seamless way to participate in online games, videoconferencing and other peer-to-peer services.

Content Filtering

With its content filtering feature, t he DG834GT prevents objectionable content from reaching your PCs. The router allows you to control access to Internet content by screening for keywords within Web addresses. You can configure the router to log and report attempts to access objectionable Internet sites.

Auto Sensing and Auto Uplink™ LAN Ethernet Connections

With its internal 4-port 10/100 switch, the DG834GT can connect to either a 10 Mbps standard Ethernet network or a 100 Mbps Fast Ethernet network. The local LAN ports are autosensing and capable of full-duplex or half-duplex operation.

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The router incorporates Auto UplinkTM technology. Each local Ethernet port will automatically sense whether the Ethernet cable plugged into the port should have a ‘normal’ connection such as to a computer or an ‘uplink’ connection such as to a switch or hub. That port will then configure itself to the correct configuration. This feature also eliminates the need to worry about crossover cables, as Auto Uplink will accommodate either type of cable to make the right connection.

What’s in the Box?

The product package should contain the following items:

• DG834GT 108 Mbps Super Wireless ADSL Router

• AC power adapter (varies by region)

• Category 5 (Cat 5) Ethernet cable

• Telephone cable

• Microfilters (quantity and type vary by region)

• 108 Mbps Super Wireless ADSL Router Resource CD, including: —This guide — Application Notes

• A printed Quick Installation Guide

• Warranty and Support Information cards

If any of the parts are incorrect, missing, or damaged, contact your NETGEAR dealer. Keep the carton, including the original packing materials, in case you need to return the product for repair.

The Router’ s Front Panel

The DG834GT 108 Mbps Super Wireless ADSL Router front panel shown below contains status LEDs.

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Power

Test

Wireless

Internet

LAN

Figure 2-2: DG834GT Front Panel

You can use the LEDs to verify various conditions. Table 2-1 lists and describes each LED on the front panel of the router. These LEDs are green when lit.

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Table 2-1. LED Descriptions

Label Activity Description

Power On

Off

Test On

Off

Wireless On

Off

Internet Blink -- Amber

On -- Green Blink -- Green

LAN On (Green)

Blink (Green) On (Amber) Blink (Amber) Off

Power is supplied to the router. Power is not supplied to the router.

The system is initializing. The system is ready and running.

Indicates that the Wireless port is initialized. The Wireless Access Point is turned off.

Indicates ADSL training. The Internet port has detected a link with an attached device. Data is being transmitted or received by the Internet port.

The Local port has detected a link with a 100 Mbps device. Data is being transmitted or received at 100 Mbps. The Local port has detected a link with a 10 Mbps device. Data is being transmitted or received at 10 Mbps. No link is detected on this port.

The Router’s Rear Panel

The rear panel of the DG834GT 108 Mbps Super Wireless ADSL Router (Figure 2-3) contains port connections.

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ADSL

Internet

Figure 2-3: DG834GT Rear Panel

LAN

Power

Reset

Wireless

Viewed from left to right, the rear panel contains the following elements:

• ADSL port for connecting the router to an ADSL line

• Four Local Ethernet RJ-45 LAN ports for connecting the router to the local computers

• Factory Default Reset push button

•DC power in

• Wireless antenna

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Chapter 3

Connecting the Router to the Internet

This chapter describes how to set up the router on your Local Area Network (LAN) and connect to the Internet. It describes how to configure your DG834GT 108 Mbps Super Wireless ADSL Router for Internet access using the Setup Wizard, or how to manually configure your Internet connection.

What You Need Before You Begin

You need to prepare the following before you can establish an Internet connection through your router:

1. The router connected to an ADSL line and a computer properly connected to the router as

explained below.

2. Active Internet service such as that provided by an ADSL account.

3. The Internet Service Provider (ISP) configuration information for your DSL account.

Note: If you purchased the DG834GT in a country where a microfilter is not included, you must

acquire one.

ADSL Microfilter Requirements

ADSL technology uses the same wires as your telephone service. However, ADSL adds signals to the telephone lines which create noise in the telephone service. You must use ADSL microfilters to filter out these signals before they reach your telephone.

ADSL Microfilter

Phone

Figure 3-1: ADSL microfilter

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Each device such as a telephone, fax machine, answering machine, or caller ID display will require an ADSL microfilter.

Note: Do not connect the DG834GT to the ADSL line through a microfilter unless the microfilter

is a combination microfilter/splitter specifically designed for this purpose. Doing so will prevent the built-in ADSL modem in the DG834GT from establishing a connection to the Internet. If you have any doubts about this, connect the DG834GT directly to the ADSL line.

ADSL Microfilter with Built-In Splitter

DSL Phone

Figure 3-2: ADSL microfilter with built-in splitter

Line

Use an ADSL microfilter with built-in splitter when there is a single wall outlet which must provide connectivity for both the DG834GT and telephone equipment.

Ethernet Cabling Requirements

The DG834GT Super Wireless ADSL Router connects to your Ethernet LAN via twisted-pair cables. If the computer will connect to your network at 100 Mbps, you must use a Category 5 (CAT5) cable such as the one provided with your router.

Computer Hardware Requirements

T o use the DG834GT Super Wireless ADSL Router on your network, each computer must have an installed Ethernet adapter and an Ethernet cable, or a 802.11g wireless adapter.

LAN Configuration Requirements

For the initial connection to the Internet and configuration of your router, you need to connect a computer to the router which is set to automatically get its TCP/IP configuration from the router via DHCP.

Note: Please refer to Appendix C, “Preparing Your Network” for assistance with DHCP

configuration.

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Internet Configuration Requirements

Depending on how your ISP set up your Internet account, you need one or more of these configuration parameters to connect your router to the Internet:

• Virtual Path Identifier (VPI)/Virtual Channel Indentifier (VCI) parameters

• Multiplexing Method

• Host and Domain Names

• ISP Login Name and Password

• ISP Domain Name Server (DNS) Addresses

• Fixed or Static IP Address

Where Do I Get the Internet Configuration Parameters?

There are several ways you can gather the required Internet connection information.

• Your ISP should have provided you with all the information needed to connect to the Internet. If you cannot locate this information, you can ask your ISP to provide it or you can try one of the options below.

• If you have a computer already connected using the active Internet access account, you can gather the configuration information from that computer.

• For Windows 95/98/ME, open the Network control panel, select the TCP/IP entry for the

Ethernet adapter, and click Properties.

• For Windows 2000/XP, open the Local Area Network Connection, select the TCP/IP entry

for the Ethernet adapter, and click Properties.

• For Macintosh computers, open the TCP/IP or Network control panel.

• You can also refer to the DG834GT Resource CD for the NETGEAR Router ISP Guide which provides Internet connection information for many ISPs.

Once you locate your Internet configuration parameters, you may want to record them on the next page.

Record Your Internet Connection Information

Print the following page. Fill in the configuration parameters from your Internet Service Provider (ISP).

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ISP Multiplexing Method and Virtual Circuit Number: The default settings of your DG834GT 108 Mbps Super Wireless ADSL Router will work fine for most ISPs. However, some ISPs use a specific Multiplexing Method or a Virtual Circuit Number for either the Virtual Path Identifier (VPI) or Virtual Channel Identifier (VCI). If your ISP provided you with a specific Multiplexing Method or VPI/VCI number, then fill in the following:

Multiplexing Method, circle one: LLC-based or VC-based VPI: ________ VCI: ___________

A number between 0 and 255.

A number between 1 and 65535.

ISP Login Name: The login name and password are case sensitive and must be entered exactly as given by your ISP. Some ISPs use your full e-mail address as the login name. The Service Name is not required by all ISPs. If you use a login name and password, then fill in the following:

Password: __________________________ __

Service Name: _____________________________ Fixed or Static IP Address: If you have a static IP address, record the following information. For

example, 169.254.141.148 could be a valid IP address. Fixed or Static Internet IP Address: ______

.______.______.______ Router IP Address: ______.______.______.______ Subnet Mask: ______.______.______.______

ISP DNS Server Addresses: If you were given DNS server addresses, fill in the following: Primary DNS Server IP Address: ______

.______.______.______

Secondary DNS Server IP Address: ______.______.______.______

Host and Domain Names: Some ISPs use a specific host or domain name like CCA7324-A or home. If you did not get host or domain names, use the following examples as a guide:

• If your main e-mail account with your ISP is aaa@yyy.com, then use aaa as your host name.

Your ISP might call this your account, user, host, computer, or system name.

• If your ISP’s mail server is mail.xxx.yyy.com, then use xxx.yyy.com as the domain name. ISP Host Name: _________________________

ISP Domain Name: _______________________

For Wireless Access: For configuration of the wireless network, record the following: Wireless Network Name (SSID): ________ ___ __ __ __ ___ __ __ _ WEP Authentication (circle one): Automatic, Open System, or Shared Key WEP Encryption (circle one): 64 or 128; Passphrase or Key: _________________________

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Connecting the DG834GT to Your LAN

This section provides instructions for connecting the DG834GT Super Wireless ADSL Router.

Note: The Resource CD included with your router contains an animated Installation Assistant to

help you through this procedure.

How to Connect the Router

There are four steps to connecting your firewall:

1. Install ADSL filters on the phone lines.

2. Connect the router to the ADSL filter.

3. Log in to the router.

4. Connect to the Internet.

Follow the steps below to connect your router to your network. Before you begin, locate the ADSL configuration information from your Internet Service Provider (ISP).

1. CONNECT ADSL FILTERS ON THE PHONE LINES.

a. You need to install a filter on every telephone or device that shares the same phone

number as your ADSL router. Select the filter that came with your router.

One-Line Filter

Two-Line Filter With Splitter

Figure 3-3: ADSL microfilters

0HONE

$3,

0HONE

,INE

Note: If you purchased the DG834GT in a country where the filter is not included, you must acquire one.

b. Two-Line Filter Example. Insert the two-line filter into the phone outlet and connect the

phone to the phone line connector (A):

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,INE

$3,

0HONE

Figure 3-4: Connecting an ADSL microfilter and phone

Note: To use a one-line filter with a separate splitter, insert the splitter into the phone outlet, connect the one-line filter to the splitter, and connect the phone to the filter.

2. CONNECT THE DG834GT TO THE ADSL FILTER.

Note: Improperly connecting a filter to your DG834GT Super Wireless ADSL Router will block your ADSL connection.

a. Turn off your computer. b. Connect the ADSL port of the DG834GT to the ADSL port (B) of the two-line filter:

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,INE

$3,

0HONE

Figure 3-5: Connecting the DG834GT Super Wireless ADSL Router to an ADSL microfilter and phone

Connect the Ethernet cable (C) from your DG834GT’s LAN port to the Ethernet adapter in your computer.

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,INE

$3,

0HONE

&RPSXWHU

*DWHZD\

Figure 3-6: Connecting a computer to the DG834GT Super Wireless ADSL Router

Note: The DG834GT Super Wireless ADSL Router incorporates Auto UplinkTM technology. Each Ethernet LAN port will automatically sense whether the cable plugged into the port should have a 'normal' connection (for example, connecting to a computer) or an 'uplink' connection (for example, connecting to a switch or hub). That port will then configure itself to the correct configuration. This feature also eliminates the need to worry about crossover cables, as Auto Uplink will accommodate either type of cable to make the right connection.

d. Connect the power adapter to the router and plug it in to a power outlet. Verify the

following:

The power light is lit after turning on the router. The ADSL link light is solid green, indicating a link has been established to the

ADSL network.

e. Now, turn on your computer. If software usually logs you in to your Internet connection,

do not run that software. Cancel it if it starts automatically. Verify the following:

The local lights are lit for any connected computers.

Note: For instructions on connecting computers to the DG834GT via wireless links, please see Chapter 4, “Wireless Configuration”.

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Note: Your computer needs to be configured for DHCP. For instructions on configuring for DHCP, please see Appendix C, “Preparing Your Network”.

a. Connect to the router by typing http://192.168.0.1 in the address field of Internet Explorer

or Netscape

Figure 3-7: Connect to the router

Navigator.

A login window opens as shown below:

Figure 3-8: Login window

When prompted, enter admin for the user name and password for the password, both in lower case letters. After logging in, you will see the menu below.

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Figure 3-9: Setup Wizard

CONNECT TO THE INTERNET

The router is now properly attached to your network. You are now ready to configure your router to connect to the Internet. There are two ways you can configure your router to connect to the Internet:

a. Let the DG834GT auto-detect the type of Internet connection you have and configure it.

See “Auto-Detecting Your Internet Connection Type” on page 3-10 for instructions.

b. Manually choose which type of Internet connection you have and configure it. See

“Manually Configuring Your Internet Connection” on page 3-15 for instructions.

These options are described below. In either case, unless your ISP automatically assigns your configuration automatically via DHCP, you need the configuration parameters from your ISP you recorded in “Record Your Internet Connection Information” on page 3-3.

Auto-Detecting Your Internet Connection Type

The Web Configuration Manager built in to the router contains a Setup Wizard that can automatically determine your network connection type.

1. If your router has not yet been configured, the Setup Wizard shown in Figure 3-9 should

launch automatically.

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Note: If instead of the Setup Wizard menu, the main menu of the router’s Configuration Manager as shown in Figure 3-15 appears, click the Setup Wizard link in the upper left to bring up this menu.

2. You must select a country and language. Language choices are English, French, German, and

Italian. After you change the language, the remaining setup screens change to the language of your choice.

3. Select Yes to allow the router to automatically determine your connection.

4. Click Next.

The Setup Wizard will now check for the following connection types:

• Dynamic IP assignment

• A login protocol such as PPPoE or PPPoA

• Classical IP over ATM (RFC1577)

• Fixed IP address assignment Next, the Setup Wizard will report which connection type it has discovered, and then display

the appropriate configuration page. If the Setup Wizard finds no connection, you will be prompted to check the physical connection between your router and the ADSL line. When the connection is properly made, the router’s Internet LED should be on.

5. The ADSL settings for the multiplexing method and VPI/VCI will update with the preset

defaults. The multiplexing method preset default settings will usually work. Only change the multiplexing method if you are sure your ISP requires Virtual Path Identifier (VPI) or Virtual Channel Identifier (VCI) settings that are different from the default values.

Incorrect VPI or VCI settings will prevent you from connecting to the Internet. To change these settings, click the ADSL Settings link on the main menu. See “ADSL Settings” on page

3-20 for more details.

The procedures for filling in the configuration page for each type of connection follow below.

Wizard-Detected PPPoE Login Account Setup

If the Setup Wizard determines that your Internet service account uses a login protocol such as PPP over Ethernet (PPPoE), you will be directed to the PPPoE page shown in Figure 3-10:

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Figure 3-10: Setup Wizard menu for PPPoE login accounts

Enter the PPPoE login user name and password.

Wizard-Detected PPPoA Login Account Setup

If the Setup Wizard determines that your Internet service account uses a login protocol such as PPP over ATM (PPPoA), you will be directed to the PPPoA page shown in Figure 3-11 below:

Figure 3-11: Setup Wizard menu for PPPoA login accounts

Enter your login user name and password. These fields are case sensitive.

Wizard-Detected Dynamic IP Account Setup

If the Setup Wizard determines that your Internet service account uses Dynamic IP assignment, you will be directed to the page shown in Figure 3-12 below:

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Figure 3-12: Setup Wizard menu for Dynamic IP address

Click Apply to set Dynamic IP as the connection method.

Wizard-Detected IP Over ATM Account Setup

If the Setup Wizard determines that your Internet service account uses IP over ATM Classical IP assignment (RFC1577), you will be directed to the page shown in Figure 3-13 below:

Figure 3-13: Setup Wizard menu for IP over ATM (Classical IP) address

Enter your assigned IP Address and Subnet Mask. This information should have been

provided to you by your ISP. You need the configuration parameters from your ISP you recorded in “Record Your Internet Connection Information” on page 3-3.

2. Enter the IP address of your ISP’s Primary DNS Server. If a Secondary DNS Server address is

available, enter it also. DNS servers are required to perform the function of translating an Internet name such as

www.netgear.com to a numeric IP address. For a fixed IP address configuration, you must

obtain DNS server addresses from your ISP and enter them manually here.

3. Click Apply to save the settings.

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Click the Test button to test your Internet connection. If the NETGEAR Web site does not

appear within one minute, refer to Chapter 8, “Troubleshooting”.

Wizard-Detected Fixed IP (Static) Account Setup

If the router determines that your Internet service account uses Fixed IP assignment, you will be directed to the page shown in Figure 3-14 below:

Figure 3-14: Setup Wizard menu for Fixed IP address

If required, enter the Account Name and Domain Name from your ISP.

2. Choose “Use Static IP Address” or “Use IP Over ATM” (IPoA — RFC1483 Routed)

according to the information from your ISP. If you choose IPoA, the router will be able to detect the gateway IP address but you still need to provide the router IP address.

3. Enter your assigned IP Address, Subnet Mask, and the IP Address of your ISP’s gateway

router. This information should have been provided to you by your ISP. You need the configuration parameters from your ISP you recorded in “Record Your Internet Connection

Information” on page 3-3.

4. Enter the IP address of your ISP’s Primary DNS Server. If a Secondary DNS Server address is

available, enter it also. DNS servers are required to perform the function of translating an Internet name such as

www.netgear.com to a numeric IP address. For a fixed IP address configuration, you must

obtain DNS server addresses from your ISP and enter them manually here.

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Click Apply to save the settings.

6. Click the Test button to test your Internet connection. If the NETGEAR Web site does not

appear within one minute, refer to Chapter 8, “Troubleshooting”.

Testing Your Internet Connection

After completing the Internet connection configuration, your can test your Internet connection. Log in to the router, then, from the Basic Settings link in the Setup menu, click the Test button. If the NETGEAR Web site does not appear within one minute, refer to Chapter 8,

“Troubleshooting”.

Your router is now configured to provide Internet access for your network. Your router automatically connects to the Internet when one of your computers requires access. It is not necessary to run a dialer or login application such as Dial-Up Networking or Enternet to connect, log in, or disconnect. These functions are performed by the router as needed.

To access the Internet from any computer connected to your router, launch a browser such as Microsoft Internet Explorer or Netscape Navigator. You should see the router’s Internet LED blink, indicating communication to the ISP. The browser should begin to display a Web page.

The following chapters describe how to configure the Advanced features of your router, and how to troubleshoot problems that may occur.

Manually Configuring Your Internet Connection

You can manually configure your router using the menu below, or you can allow the Setup W izard to determine your configuration as described in the previous section.

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ISP Does Not Require Login

Figure 3-15: Basic Settings menu

ISP Does Require Login

How to Perform Manual Configuration

We recommend that you start the manual configuration from the Setup Wizard:

1. Select your country and language. Language choices are Englis h, French, Germa n, and Italian.

After you change the language, the remaining setup screens change to the language of your choice.

2. Select No to manually configure your router connection.

3. Click Next.

4. Manually configure the router in the Basic Settings menu shown in Figure 3-15.

5. Follow the instructions below according to the encapsulation method and whether your

Internet connection requires a login. The following methods are available:

• Internet Connection Requires Login and Uses PPPoE

• Internet Connection Requires Login and Uses PPPoA

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• Internet Connection Does Not Require a Login

6. Usually the default ADSL Settings work fine for most ISPs and you can skip this step. If you

have any problems with your connection, check the ADSL Settings. See “ADSL Settings” on

page 3-20 for more details.

Internet Connection Requires Login and Uses PPPoE

1. If your Internet connection does require login, select Yes and fill in the settings according to

the instructions below. Note: You will no longer need to launch the ISP’s login program on your computer in order to

access the Internet. When you start an Internet application, your router automatically logs you in.

2. Choose PPPoE for the encapsulation method.

3. Enter the login name (frequently the email address your ISP provided), password, and service

name (if required).

4. If you want to change the login timeout, enter a new value in minutes. This determines how

long the router keeps the Internet connection active after there is no Internet activity from the LAN. Entering an Idle Timeout value of zero means never log out.

5. When a connection uses PPPoE, the IP address is normally assigned automatically. However,

the DG834GT allows this address to be set manually.

• Select “Get Automatically from ISP” if your ISP assigns your IP address.

• Select “Use Static IP Address” if your ISP gave you a statically assigned address.

6. The DNS server is used to look up site addresses based on their names.

• Select “Get Automatically from ISP” if your ISP uses DHCP to assign your DNS servers. Your ISP will automatically assign this address.

• Select “Use These DNS Servers” if your ISP gave you one or two DNS addresses. Type the primary and secondary addresses.

7. You should only disable NAT if you are sure you do not require it. NAT automatically assigns

private IP addresses (192.168.0.x) to LAN connected devices. When NAT is disabled, only standard routing is performed by this router. Classical routing lets you directly manage the IP addresses the DG834GT uses. Classical routing should be selected only by experienced users.

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Note: Disabling NAT will reboot the router and reset all the DG834GT configuration settings to the factory default. Disable NAT only if you plan to install the DG834GT in a setting where you will be manually administering the IP address space on the LAN side of the router.

Internet Connection Requires Login and Uses PPPoA

1. If your Internet connection does require login, select Yes and fill in the settings according to

the instructions below. Note: You will no longer need to launch the ISP’s login program on your computer in order to

access the Internet. When you start an Internet application, your router automatically logs you in.

2. Choose PPPoA for the encapsulation method.

3. Enter the login name (frequently the email address your ISP provided), and password.

4. If you want to change the login timeout, enter a new value in minutes. This determines how

long the router keeps the Internet connection active after there is no Internet activity from the LAN. Entering an Idle Timeout value of zero means never log out.

5. When a connection uses PPPoA, the IP address is normally assigned automatically. However,

the DG834GT allows this address to be set manually.

• Select “Get Automatically from ISP” if your ISP assigns your IP address.

• Select “Use Static IP Address” if your ISP gave you a statically assigned address.

6. The DNS server is used to look up site addresses based on their names.

• Select “Get Automatically from ISP” if your ISP uses DHCP to assign your DNS servers. Your ISP will automatically assign this address.

7. Select “Use These DNS Servers” if your ISP gave you one or two DNS addresses. Type the

primary and secondary addresses.You should only disable NAT if you are sure you do not require it. NAT automatically assigns private IP addresses (192.168.0.x) to LAN connected devices. When NAT is disabled, only standard routing is performed by this router. Classical routing lets you directly manage the IP addresses the DG834GT uses. Classical routing should be selected only by experienced users.

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Internet Connection Does Note Require A Login

1. If your Internet connection does not require a login, select No and fill in the settings according

to the instructions below.

2. Enter your Account Name (may also be called Host Name) and Domain Name.

These parameters may be necessary to access your ISP’s mail or news servers.

3. Internet IP Address:

• Select “Get Dynamically from ISP” if your ISP uses DHCP to assign your IP address. Your ISP will automatically assign these addresses.

• Select “Use Static IP Address” if your ISP has assigned you a permanent, fixed (static) IP address. Enter the IP address that your ISP assigned. Also enter the IP Subnet Mask and the Gateway IP Address. The gateway is the ISP’s router to which your router will connect.

• Select “IP Over ATM (IPoA)” if your ISP uses Classical IP Addresses (RFC1577). Enter the IP address, IP Subnet Mask, and Gateway IP Addresses that your ISP assigned.

4. Domain Name Server (DNS) Address:

• Select “Get Dynamically from ISP” if your ISP uses DHCP to assign your IP address. Your ISP will automatically assign this address.

• If you know that your ISP does not automatically transmit DNS addresses to the router during login, select “Use these DNS servers” and enter the IP address of your ISP’s Primary DNS Server. If a Secondary DNS Server address is available, enter it also.

A DNS server is a host on the Internet that translates Internet names (such as www .netgear.com) to numeric IP addresses. T ypically your ISP transfers the IP address of one or two DNS servers to your router during login. If the ISP does not transfer an address, you must obtain it from the ISP and enter it manually here.

5. You should only disable NAT if you are sure you do not require it. NAT automatically assigns

private IP addresses (192.168.0.x) to LAN connected devices. When NAT is disabled, only standard routing is performed by this router.

Classical routing lets you directly manage the IP addresses the DG834GT uses. Classical routing should be selected only by experienced users.

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Router MAC Address:

This section determines the Ethernet MAC address that will be used by the router on the Internet port. Some ISPs will register the Ethernet MAC address of the network interface card in your computer when your account is first opened. They will then only accept traffic from the MAC address of that computer. This feature allows your router to masquerade as that computer by “cloning” its MAC address.

T o change the MAC address, select “Use this Computer’ s MAC address”. The router will then capture and use the MAC address of the computer that you are now using. You must be using the one computer that is allowed by the ISP. Alternatively, select “Use this MAC address” and enter it.

7. Click Apply to save your settings.

8. Click the Test button to test your Internet connection.

If the NETGEAR Web site does not appear within one minute, refer to Chapter 8,

“Troubleshooting”.

ADSL Settings

The default settings of your DG834GT 108 Mbps Super Wireless ADSL Router will work fine for most ISPs. However, some ISPs use a specific Multiplexing Method and Virtual Circuit Number for the Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI).

Note: The correct country must be selected from the Setup Wizard’s first page for the default

ADSL Settings to work. If your ISP provided you with a specific Multiplexing Method or VPI/VCI number, then fill in the

following:

1. Select the ADSL Settings link from the main menu.

2. For the Multiplexing Method, select LLC-based or VC-based.

3. Type a number between 0 and 255 for the VPI. The default is 8.

4. Type a number between 1 and 65535 for the VCI. The default is 35.

5. Click Apply.

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Chapter 4

Wireless Configuration

This chapter describes how to configure the wireless features of your DG834GT 108 Mbps Super Wireless ADSL Router.

Considerations for a Wireless Network

In planning your wireless network, you should consider the level of security required. You should also select the physical placement of your router in order to maximize the network speed. For further information, refer to Appendix D, “Wireless Networking Basics”.

To ensure proper compliance and compatibility between similar products in your area, the operating channel and region must be set correctly.

Observe Performance, Placement, and Range Guidelines

The operating distance or range of your wireless connection can vary significantly bas ed on the physical placement of the wireless firewall. The latency, data throughput performance, and notebook power consumption also vary depending on your configuration choices.

Note: Failure to follow these guidelines can result in significant performance

degradation or inability to wirelessly connect to the router. For complete range/ performance specifications, please see Appendix A, “Technical Specifications”.

For best results, place your firewall:

• Near the center of the area in which your computers will operate

• In an elevated location such as a high shelf where the wirelessly connected computers have line-of-sight access (even if through walls)

• Away from sources of interference, such as computers, microwaves, and cordless phones

• With the Antenna tight and in the upright position

• Away from large metal surfaces

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1) Open System: Easy but no security

2) MAC Access List: No data security

3) WEP: Security but some performance impact

4) WPA-PSK

Wireless Data

Security Options

Range: Up to 300 Feet

PCs

Servers

The time it takes to establish a wireless connection can vary depending on both your security settings and placement. WEP connections can take slightly longer to establish. Also, WEP encryption can consume more battery power on a notebook computer.

Implement Appropriate Wireless Security

Note: Indoors, computers can connect over 802.11g wireless networks at a maximum

range of up to 300 feet. Such distances can allow for others outside o f your immediate area to access your network.

Unlike wired network data, your wireless data transmissions can extend beyond your walls and can be received by anyone with a compatible adapter. For this reason, use the security features of your wireless equipment. The DG834GT Super Wireless ADSL Router provides highly effective security features which are covered in detail in this chapter. Deploy the security features appropriate to your needs.

DG834GT

Figure 4-1: DG834GT wireless data security options

There are several ways you can enhance the security of your wireless network:

• Restrict Access Based on MAC Address. You can allow only trusted PCs to connect so that unknown PCs cannot wirelessly connect to the DG834G T. Restricting access by MAC address adds an obstacle against unwanted access to your network, but the data broadcast over the wireless link is fully exposed.

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• Turn Off the Broadcast of the Wireless Network Name SSID. If you disable broadcast of the SSID, only devices that have the correct SSID can connect. This nullifies wireless network ‘discovery’ feature of some products, such as Windows XP, but the data is still exposed.

• WEP. Wired Equivalent Privacy (WEP) data encryption provides data security. WEP Shared Key authentication and WEP data encryption will block all but the most determined eavesdropper.

• WPA-PSK. Wi-Fi Protected Access (WPA) data encryption provides data security. The very strong authentication along with dynamic per frame re-keying of WPA make it virtually impossible to compromise. Because this is a new standard, wireless device driver and software availability may be limited.

Understanding Wireless Settings

To configure the Wireless interface of your router, click the Wireless link in the main menu of the browser interface. The following Wireless Settings menu will appear after WEP (W ired Equivalent Privacy) under Security Options is subsequently selected:

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Figure 4-2: Wireless Settings menu

The following parameters are in the Wireless Settings menu:

• Wireless Network. — Name (SSID). The Service Set ID, also known as the wireless network name. Enter a

value of up to 32 alphanumeric characters. The same Name (SSID) must be assigned to all wireless devices in your network. The default SSID is NETGEAR, but NETGEAR strongly recommends that you change your network Name to a different value.

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Note: This value is case sensitive. For example, Wireless is not the same as wireless.

— Region. Select your region from the drop-down list. This field displays the region of

operation for which the wireless interface is intended. It may not be legal to operate the router in a region other than the region shown here.

— Channel. This field determines which operating frequency will be used. It should not be

necessary to change the wireless channel unless you notice interference problems with another nearby access point.

— Mode.

• "g & b" allows both "g" and "b" wireless stations to access this device (default).

• “g only” allows only 802.11g wireless stations to be used.

• “b only” allows 802.11b wireless stations; 802.1 1g wireless stations can still be used if they can operate in 802.11b mode.

• “Auto 108 Mbps” means all 802.11g, 802.11b, and Netgear 108 Mbps wireless stations can be used. The Auto 108 Mbps mode is the second fastest mode.

• “108 Mbps only” means only compatible 802.11g wireless stations that support 108 Mbps can connect. The 108 Mbps only mode is the fastest mode.

Note: Only use the 108 Mbps only mode when all wireless adapters in your open

network bear the 108 Mbps logo.

10 8

Figure 4-3: 108 Mbps Logo

• Wireless Access Point. — Enable Wireless Access Point. This field lets you turn off or turn on the wireless access

point built in to the router. The wireless icon on the front of the router will also display the current status of the Wireless Access Point to let you know if it is disabled or enabled. The wireless access point must be enabled to allow wireless stations to access the Internet.

— Allow Broadcast of Name (SSID). If enabled, the SSID is broadcast to all Wireless

Stations. Stations which hav e no SSID (o r a "n ull" value) can then adopt the correct SSID for connections to this Access Point.

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— Wireless Isolation. If enabled, Wireless S tations will not be able to communicate with

each other or with Stations on the wired network. This feature should normally be disabled.

• Wireless Station Access List. — By default, any wireless computer that is configured with the correct wireless network

name or SSID will be allowed access to your wireless network. For increased security , you can restrict access to the wireless network to only specific computers based on their MAC addresses. Click Setup Access List to display the Wireless Station Access List menu.

• Security Options

Table 4-1. Wireless Security Options

Field Description Disable

WEP (Wired

Equivalent Privacy)

Wireless security is not used. Y ou can select th e following W EP options:

Authentication Type

• Open: the DG834GT does not perform any authentication.

• Shared: WEP shared key authentication. For a full explanation of WEP shared key, see

“Authentication and WEP Data Encryption” on page D-2.

Encryption Strength

• If Shared or Open Network Authentication is enabled, you can choose 64- or 128-bit WEP data encryption. Note: With Open Network Authentication and 64- or 128-bit WEP Data Encryption, the DG834GT does perform 64- or 128-bit data encryption but does not perform any authentication.

Security Encryption (WEP) Key

These key values must be identical on all wireless devices in your network (key 1 must be the same for all, key 2 must be the same for all, and so on). The DG834GT provides two methods for creating WEP encryption keys:

• Passphrase. These characters are case sensitive. Enter a word or group of printable characters in the Passphrase box and click the Generate button. Note: Not all wireless adapters support passphrase key generation.

• Manual. These values are not case sensitive.

64-bit WEP: enter 10 hexadecimal digits (any combination of 0-9, a-f, or A-F). 128-bit WEP: enter 26 hexadecimal digits (any combination of 0-9, a-f, or A-F).

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Table 4-1. Wireless Security Options

Field Description

WPA-PSK

(Wi-Fi Protected Access Pre-Shared Key)

WPA-802.1x User authentication is implemented using 802.1x and RADIUS servers. For a full

WPA Pre-Shared-Key uses a pre-shared key to perform the authentication and generate the initial data encryption keys. Then, it dynamically varies the encryption key. For a full explanation of WPA, see “WPA Wireless Security” on page D-8.

explanation of WPA, see “WPA Wireless Security” on page D-8. Fill in the following:

• Radius Server Name/IP Address This field is required. Enter the name or IP address of the Radius Server on your LAN.

• Radius Port Enter the port number used for connections to the Radius Server.

• Radius Shared Key Enter the desired value for the Radius shared key. This key enables the DG834GT to log in to the Radius server and must match the value used on the Radius server.

How to Set Up and Test Basic Wireless Connectivity

Follow the instructions below to set up and test basic wireless connectivity. Once you have established basic wireless connectivity , you can enable security settings appropriate to your needs.

1. Log in to the DG834GT firewall at its default LAN address of http://192.168.0.1 with its

default user name of admin and default password of password, or using whatever LAN address and password you have set up.

2. Click the Wireless Settings link in the main menu of the DG834GT firewall.

3. Choose a suitable descriptive name for the wireless network name (SSID). In the SSID box,

enter a value of up to 32 alphanumeric characters. The default SSID is Wireless. Note: The SSID of any wireless access adapters must match the SSID you configure in the

DG834GT 108 Mbps Super Wireless ADSL Router. If they do not match, you will not get a wireless connection to the DG834GT.

4. Set the Region. Select the region in which the wireless interface will operate.

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Set the Channel. The default channel is 11.

This field determines which operating frequency will be used. It should not be necessary to change the wireless channel unless you notice interference problems with another nearby wireless router or access point. Select a channel that is not being used by any other wireless networks within several hundred feet of your firewall. For more information on the wireless channel frequencies please refer to “Wireless Channels” on page D-7.

6. For initial configuration and test, leave the Wireless Card Access List set to allow everyone

access by making sure that “Turn Access Control On” is not selected in the Wireless Station Access List. In addition, leave the Encryption Strength set to “Disabled.”

7. Click Apply to save your changes.

Note: If you are configuring the firewall from a wireless computer and you change the

firewall’s SSID, channel, or security settings, you will lose your wireless connection when you click Apply. You must then change the wireless settings of your computer to match the firewall’s new settings.

8. Configure and test your computers for wireless connectivity.

Program the wireless adapter of your computers to have the same SSID and channel that you configured in the router. Check that they have a wireless link and are able to obtain an IP address by DHCP from the firewall.

Once your computers have basic wireless connectivity to the firewall, you can configure the advanced wireless security functions of the firewall.

How to Restricting Wireless Access to Your Network

By default, any wireless PC that is configured with the correct SSID will be allowed access to your wireless network. For increased security, the DG834GT 108 Mbps Super Wireless ADSL Router provides several ways to restrict wireless access to your network:

• Turn off wireless connectivity completely

• Restrict access based on the Wireless Network Name (SSID)

• Restrict access based on the Wireless Card Access List These options are discussed below.

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Figure 4-4: Wireless Access Point settings

Restricting Access to Your Network by Turning Off Wireless Connectivity

You can completely turn off the wireless portion of the DG834GT. For example, if your notebook computer is used to wirelessly connect to your router and you take a business trip, you can turn off the wireless portion of the router while you are traveling. Other members of your household who use computers connected to the router via Ethernet cables will still be able to use the router.

Restricting Wireless Access Based on the Wireless Network Name (SSID)

The DG834GT can restrict wireless access to your network by not broadcasting the wireless network name (SSID). However, by default, this feature is turned off. If you turn this feature on, wireless devices will not ‘see’ your DG834GT. You must configure your wireless devices to match the wireless network name (SSID) you configure in the DG834GT Super Wireless ADSL Router.

Note: The SSID of any wireless access adapters must match the SSID you configure in the DG834GT 108 Mbps Super Wireless ADSL Router. If they do not match, you will not get a wireless connection to the DG834GT.

Restricting Wireless Access Based on the Wireless Station Access List

This list determines which wireless hardware devices will be allowed to connect to the firewall. To restrict access based on MAC addresses, follow these steps:

1. Log in to the DG834GT firewall at its default LAN address of http://192.168.0.1 with its

default user name of admin and default password of password, or using whatever LAN address and password you have set up.

2. From the Wireless Settings menu, Wireless Station Access List section, click the Setup Access

List button to display the list, shown below:

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Figure 4-5. Wireless Access menu

Select the Turn Access Control On check box to enable restricting wireless computers by their MAC addresses.

4. If the wireless station is currently connected to the network, you can select it from the

Available Wireless Stations list. Click Add to add the station to the Trusted Wireless Stations list.

5. If the wireless station is not currently connected, you can enter its address manually. Enter the

MAC address of the authorized computer. The MAC address is usually printed on the wireless card, or it may appear in the router’s DHCP table. The MAC address will be 12 hexadecimal digits.

Click Add to add your entry. You can add several stations to the list, but the entries will be discarded if you do not click Apply.

Note: You can copy and paste the MAC addresses from the router’s Attached Devices menu

into the MAC Address box of this menu. To do this, configure each wireless computer to obtain a wireless link to the router. The computer should then appear in the Attached Devices menu.

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Note: If you are configuring the router from a wireless computer whose MAC address is not in the Trusted Wireless Stations list, and you select Trusted Wireless Stations only, you will lose your wireless connection when you click Apply. You must then access the router from a wired computer to make any further changes.

Make sure the Turn Access Control On check box is selected, then click Apply.

Now, only devices on this list will be allowed to wirelessly connect to the DG834GT. This prevents unauthorized access to your network.

Choosing WEP Authentication and Security Encryption Methods

Figure 4-6. Security Encryption section

Restricting wireless access prevents intruders from connecting to your network. However, the wireless data transmissions are still vulnerable to snooping. Using the WEP data encryption settings described below will prevent a determined intruder from eavesdropping on your wireless data communications. Also, if you are using the Internet for such activities as purchases or banking, those Internet sites use another level of highly secure encryption called SSL. You can tell if a web site is using SSL because the web address begins with HTTPS rather than HTTP.

Authentication Type Selection

The DG834GT lets you select the following wireless authentication schemes.

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• Automatic

• Open System

• Shared key

Note: The authentication scheme is separate from the data encryption. You can choose

an authentication scheme which requires a shared key but still leave the data transmissions unencrypted. If you require strong security, use both the Shared Key and WEP encryption settings.

Set your wireless adapter according to the authentication scheme you choose for the DG834GT Super Wireless ADSL Router. Please refer to “Authentication and WEP Data Encryption” on page

D-2 for a full explanation of each of these options, as defined by the IEEE 802.11g wireless

communication standard.

Encryption Choices

Please refer to “Overview of WEP Parameters” on page D-5 for a full explanation of each of the following choices, as defined by the IEEE 802.11g wireless communication standard. Choose the encryption strength from the drop-down list:

Disable

No encryption will be applied. This setting is useful for troubleshooting your wireless connection, but leaves your wireless data fully exposed.

64 or 128 bit WEP

When 64 Bit WEP or 128 Bit WEP is selected, WEP encryption will be applied.

If WEP is enabled, you can manually or automatically program the four data encryption keys. These values must be identical on all computers and access points in your network.

There are two methods for creating WEP encryption keys:

• Passphrase. Enter a word or group of printable characters in the Passphrase box and click the Generate button.

• Manual. 64-bit WEP: Enter 10 hexadecimal digits (any combination of 0-9, a-f, or A-F). 128-bit WEP: Enter 26 hexadecimal digits (any combination of 0-9, a-f, or A-F).

Select the radio button for the key you want to make active.

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How to Configure WEP

To configure WEP data encryption, follow these steps:

1. Log in to the DG834GT firewall at its default LAN address of http://192.168.0.1 with its

default user name of admin and default password of password, or using whatever LAN address and password you have set up.

2. Click the Wireless Settings link in the main menu of the DG834GT router.

3. Go to the Security Encryption portion of the page:

Figure 4-7. Wireless WEP menu

Select the Authentication Type.

5. Select the Encryption setting.

6. Enter the encryption keys. You can manually or automatically program the four data

encryption keys. These values must be identical on all computers and Access Points in your network.

• Automatic — enter a word or group of printable characters in the Passphrase box and click

the Generate button. The four key boxes will be automatically populated with key values.

• Manual — enter hexadecimal digits (any combination of 0-9, a-f, or A-F).

Select which of the four keys will be active.

7. Select the radio button for the key you want to make active.

Be sure you clearly understand how the WEP key settings are configured in your wireless adapter. Wireless adapter configuration utilities such as the one included in Windows XP only allow entry of one key which must match the default key you set in the DG834GT.

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Click Apply to save your settings.

Note: When configuring the router from a wireless computer, if you configure WEP

settings, you will lose your wireless connection when you click Apply. You must then either configure your wireless adapter to match the router WEP settings or access the router from a wired computer to make any further changes.

How to Configure WPA-PSK

Note: Not all wireless adapters support WPA. Furthermore, client software is required on the client. Windows XP and Windows 2000 with Service Pack 3 do include the client software that supports WPA. Nevertheless, the wireless adapter hardware and driver must also support WPA. Consult the product document for your wireless adapter and WPA client software for instructions on configuring WPA settings.

To configure WPA-PSK, follow these steps:

1. Log in at the default LAN address of http://192.168.0.1, with the default user name of admin

and default password of password, or using whatever LAN address and password you have set up.

2. Click Wireless Settings in the Setup section of the main menu of the DG834GT.

3. Choose the WPA-PSK radio button. The WPA-PSK menu will open.

4. Enter the pre-shared key in the Passphrase field.

5. Click Apply to save your settings.

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Chapter 5

Protecting Your Network

This chapter describes how to use the basic firewall features of the DG834GT 108 Mbps Super Wireless ADSL Router to protect your network.

Protecting Access to Your DG834GT 108 Mbps Super Wireless ADSL Router

For security reasons, the router has its own user name and password. Also, after a period of inactivity for a set length of time, the administrator login will automatically disconnect. When prompted, enter admin for the router User Name and password for the router Password. You can use procedures below to change the router's password and the amount of time for the administrator’s login timeout.

Note: The user name and password are not the same as any user name or password your may use

to log in to your Internet connection. NETGEAR recommends that you change this password to a more secure password. The ideal

password should contain no dictionary words from any language, and should be a mixture of both upper and lower case letters, numbers, and symbols. Your password can be up to 30 characters.

How to Change the Built-In Password

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

Figure 5-1: Log in to the router

From the Main Menu of the browser interface, under the Maintenance heading, select Set Password to bring up the menu shown in Figure 5-2.

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Figure 5-2: Set Password menu

To change the password, first enter the old password, and then enter the new password twice.

4. Click Apply to save your changes.

Note: After changing the password, you will be required to log in again to continue the

configuration. If you have backed up the router settings previously , you should do a new backup so that the saved settings file includes the new password.

Changing the Administrator Login Timeout

For security, the administrator's login to the router configuration will timeout after a period of inactivity. To change the login timeout period:

1. In the Set Password menu, type a number in ‘Administrator login times out’ field. The

suggested default value is 5 minutes.

2. Click Apply to save your changes or click Cancel to keep the current period.

Configuring Basic Firewall Services

Basic firewall services you can configure include access blocking and scheduling of firewall security. These topics are presented below.

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Blocking Keywords, Sites, and Services

The router provides a variety of options for blocking Internet based content and communications services. With its content filtering feature, the DG834GT Super Wireless ADSL Router prevents objectionable content from reaching your PCs. The router allows you to control access to Internet content by screening for keywords within Web addresses. Key content filtering options include:

• Keyword blocking of HTTP traffic.

• Outbound Service Blocking limits access from your LAN to Internet locations or services that you specify as off-limits.

• Denial of Service (DoS) protection. Automatically detects and thwarts Denial of Service (DoS) attacks such as Ping of Death, SYN Flood, LAND Attack and IP Spoofing.

• Blocking unwanted traffic from the Internet to your LAN.

The section below explains how to configure your

router to perform these functions.

How to Block Keywords and Sites

The DG834GT Super Wireless ADSL Router allows you to restrict access to Internet content based on functions such as Web addresses and Web address keywords.

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

2. Select the Block Sites link of the Security menu.

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Figure 5-3: Block Sites menu

To enable keyword blocking, select one of the following:

• Per Schedule—to turn on keyword blocking according to the settings on the Schedule

page.

• Always—to turn on keyword blocking all of the time, independent of the Schedule page.

4. Enter a keyword or domain in the Keyword box, click Add Keyword, then click Apply.

Some examples of Keyword application follow:

• If the keyword “XXX” is specified, the URL <http://www.badstuff.com/xxx.html> is

blocked.

• If the keyword “.com” is specified, only Web sites with other domain suffixes (such as

.edu or.gov) can be viewed.

• Enter the keyword “.” to block all Internet browsing access. Up to 32 entries are supported in the Keyword list.

5. T o delete a keyword or domain, select it from the list, click Delete Keyword, then click Apply.

6. To specify a trusted user, enter that computer’s IP address in the Trusted IP Address box and

click Apply. You can specify one trusted user, which is a computer that will be exempt from blocking and

logging. Since the trusted user will be identified by an IP address, you should configure that computer with a fixed IP address.

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Click Apply to save your settings.

Firewall Rules

Firewall rules are used to block or allow specific traffic passing through from one side of the router to the other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources, selectively allowing only specific outside users to access specific resources. Outbound rules (LAN to WAN) determine what outside resources local users can have access to.

A firewall has two default rules, one for inbound traffic and one for outbound. The default rules of the DG834GT are:

• Inbound: Block all access from outside except responses to requests from the LAN side.

• Outbound: Allow all access from the LAN side to the outside.

You can define additional rules that will specify exceptions to the default rules. By adding custom rules, you can block or allow access based on the service or application, source or destinat ion IP addresses, and time of day. You can also choose to log traffic that matches or does not match the rule you have defined.

You can change the order of precedence of rules so that the rule that applies most often will take effect first. See “Order of Precedence for Rules” on page 5-11 for more details.

T o access the rules configuration of the DG834G T, click the Firewall Rules link on the main menu, then click Add for either an Outbound or Inbound Service.

Figure 5-4: Rules menu

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• To edit an existing rule, select its button on the left side of the table and click Edit.

• To delete an existing rule, select its button on the left side of the table and click Delete.

• T o move an existing rule to a dif ferent position in the table, select its button on the left side

of the table and click Move. At the script prompt, enter the number of the desired new position and click OK.

Inbound Rules (Port Forwarding)

Because the DG834GT uses Network Address Translation (NAT), your network presents only one IP address to the Internet, and outside users cannot directly address any of your local computers. However, by defining an inbound rule you can make a local server (for example, a Web server or game server) visible and available to the Internet. The rule tells the rou ter to direct inb ound traffic for a particular service to one local server based on the destination port number. This is also known as port forwarding.

Note: Some residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at your location. If you are unsure, refer to the Acceptable Use Policy of your ISP.

Remember that allowing inbound services opens holes in your firewall. Only enable those ports that are necessary for your network. Following are two application examples of inbound rules:

Inbound Rule Example: A Local Public Web Server

If you host a public W eb ser ver on your local network, you can define a rule to allow inbound Web (HTTP) requests from any outside IP address to the IP address of your Web server at any time of day. This rule is shown in Figure 5-5:

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Figure 5-5: Rule example:

The parameters are:

•Service

From this list, select the application or service to be allowed or blocked. The list already displays many common services, but you are not limited to these choices. Use the Services menu to add any additional services or applications that do not already appear.

• Action

Choose how you want this type of traffic to be handled. You can block or allow always, or you can choose to block or allow according to the schedule you have defined in the Schedule menu.

• Send to LAN Server

Enter the IP address of the computer or server on your LAN which will receive the inbound traffic covered by this rule.

A Local Public Web Server

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• WAN Users

These settings determine which packets are covered by the rule, based on their source (WAN) IP address. Select the desired option:

• Any — all IP addresses are covered by this rule.

• Address range — if this option is selected, you must enter the Start and Finish fields.

• Single address — enter the required address in the Start field.

•Log

You can select whether the traffic will be logged. The choices are:

• Never — no log entries will be made for this service.

• Always — any traffic for this service type will be logged.

• Match — traffic of this type which matches the parameters and action will be logged.

• Not match — traffic of this type which does not match the parameters and action will be logged.

Inbound Rule Example: Allowing Videoconferencing

If you want to allow incoming videoconferencing to be initiated from a restricted range of outside IP addresses, such as from a branch office, you can create an inbound rule. In the example shown in Figure 5-6, CU-SeeMe connections are allowed only from a specified range of external IP addresses. In this case, we have also specified logging of any incoming CU-SeeMe requests that do not match the allowed parameters.

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Figure 5-6: Rule example: Videoconference from Restrict ed Addresses

Considerations for Inbound Rules

• If your external IP address is assigned dynamically by your ISP, the IP address may change periodically as the DHCP lease expires. Consider using the Dynamic DNS feature in the Advanced menu so that external users can always find your network.

• If the IP address of the local server computer is assigned by DHCP, it may change when the computer is rebooted. To avoid this, use the Reserved IP address feature in the LAN IP menu to keep the computer’s IP address constant.

• Local computers must access the local server using the computer’s local LAN address (192.168.0.11 in the example in Figure 5-6 above). Attempts by local computers to access the server using the external WAN IP address will fail.

Outbound Rules (Service Blocking)

The DG834GT allows you to block the use of certain Internet services by computers on your network. This is called service blocking or port filtering. You can define an outbound rule to block Internet access from a local computer based on:

• IP address of the local computer (source address)

• IP address of the Internet site being contacted (destination address)

•Time of day

• Type of service being requested (service port number)

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Following is an application example of outbound rules:

Outbound Rule Example: Blocking Instant Messenger

If you want to block Instant Messenger usage by employees during working hours, you can create an outbound rule to block that application from any internal IP address to any external address according to the schedule that you have created in the Schedule menu. Y ou can also have the router log any attempt to use Instant Messenger during that blocked period.

Figure 5-7: Rule example: Blocking Instant Messenger

The parameters are:

•Service

From this list, select the application or service to be allowed or blocked. The list already displays many common services, but you are not limited to these choices. Use the Add Custom Service feature to add any additional services or applications that do not already appear.

• Action

Choose how you want this type of traffic to be handled. You can block or allow always, or you can choose to block or allow according to the schedule you have defined in the Schedule menu.

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• LAN Users

These settings determine which packets are covered by the rule, based on their source LAN IP address. Select the desired option:

• Any — all IP addresses are covered by this rule.

• Address range — if this option is selected, you must enter the Start and Finish fields.

• Single address — enter the required address in the Start field.

• WAN Users

These settings determine which packets are covered by the rule, based on their destination WAN IP address. Select the desired option:

• Any — all IP addresses are covered by this rule.

• Address range —if this option is selected, you must enter the Start and Finish fields.

• Single address — enter the required address in the Start field.

•Log

You can select whether the traffic will be logged. The choices are:

• Never — no log entries will be made for this service.

• Always — any traffic for this service type will be logged.

• Match — traffic of this type that matches the parameters and action will be logged.

• Not match — traffic of this type that does not match the parameters and action will be logged.

Order of Precedence for Rules

As you define new rules, they are added to the tables in the Rules menu, as shown in Figure 5-8:

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Figure 5-8: Rules table with examples

For any traffic attempting to pass through the firewall, the packet information is subjected to the rules in the order shown in the Rules Table, beginning at the top and proceeding to the default rules at the bottom. In some cases, the order of precedence of two or more rules may be important in determining the disposition of a packet. The Move button allows you to relocate a defined rule to a new position in the table.

Services

Services are functions performed by server computers at the request of client computers. For example, Web servers serve Web pages, time servers serve time and date information, and game hosts serve data about other players’ moves. When a computer on the Internet sends a request for service to a server computer, the requested service is identified by a service or port number. This number appears as the destination port number in the transmitted IP packets. For example, a packet that is sent with destination port number 80 is an HTTP (Web server) request.

The service numbers for many common protocols are defined by the Internet Engineering Task Force (IETF) and published in RFC1700, “Assigned Numbers.” Service numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of the application.

Although the DG834GT already holds a list of many service port numbers, you are not limited to these choices. Use the procedure below to create your own service definitions.

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How to Define Services

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

2. Select the Services link of the Security menu to display the Services menu shown in

Figure 5-9:

Figure 5-9: Services menu

• To create a new Service, click the Add Custom Service button.

• To edit an existing Service, select its button on the left side of the table and click Edit Service.

• To delete an existing Service, select its button on the left side of the table and click Delete Service.

3. Use the page shown below to define or edit a service.

Figure 5-10: Add Services menu

Click Apply to save your changes.

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Setting Times and Scheduling Firewall Services

The DG834GT Super Wi reless ADSL Router uses the Network T ime Protocol (NTP) to obtain the current time and date from one of several Network Time Servers on the Internet.

How to Set Your Time Zone

In order to localize the time for your log entries, you must specify your Time Zone:

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

2. Select the Schedule link of the Security menu to display menu shown below.

Figure 5-11: Schedule Services menu

Select your Time Zone. This setting will be used for the blocking schedule according to your local time zone and for time-stamping log entries.

Select the Adjust for daylight savings time check box if your time zone is currently in daylight savings time.

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Note: If your region uses Daylight Savings Time, you must manually select Adjust for Daylight Savings Time on the first day of Daylight Savings Time, and clear it at the end. Enabling Daylight Savings Time will cause one hour to be added to the standard time.

4. The router has a list of NETGEAR NTP servers. If you would prefer to use a particular NTP

server as the primary server, enter its IP address under Use this NTP Server.

5. Click Apply to save your settings.

How to Schedule Firewall Services

If you enabled services blocking in the Block Services menu or Port forwarding in the Ports menu, you can set up a schedule for when blocking occurs or when access is not restricted.

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

2. Select the Schedule link of the Security menu to display menu shown above in the Schedule

Services menu.

3. T o block Internet services based on a schedule, select Every Day or select one or more days. If

you want to limit access completely for the selected days, select All Day. Otherwise, to limit access during certain times for the selected days, enter Start Blocking and End Blocking times.

Note: Enter the values in 24-hour time format. For example, 10:30 am would be 10 hours and

30 minutes and 10:30 pm would be 22 hours and 30 minutes. If you set the start time after the end time, the schedule will be effective through midnight the next day.

4. Click Apply to save your changes.

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Chapter 6

Managing Your Network

This chapter describes how to perform network management tasks with your DG834GT 108 Mbps Super Wireless ADSL Router.

Backing Up, Restoring, or Erasing Your Settings

The configuration settings of the DG834GT Super Wireless ADSL Router are stored in a configuration file in the router. This file can be backed up to your computer, restored, or reverted to factory default settings. The procedures below explain how to do these tasks.

How to Back Up the Configuration to a File

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

2. From the Maintenance heading of the Main Menu, select the Backup Settings menu as seen in

Figure 6-1.

Figure 6-1: Backup Settings menu

Click Backup to save a copy of the current settings.

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Store th e.cfg file on a computer on your network.

How to Restore the Configuration from a File

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

2. From the Maintenance heading of the Main Menu, select the Settings Backup menu as seen in

Figure 6-1.

3. Enter the full path to the file on your network or click the Browse button to locate the file.

4. When you have located the.cfg file, click the Restore button to upload the file to the router.

5. The router will then reboot automatically.

How to Erase the Configuration

It is sometimes desirable to restore the router to the factory default settings. This can be done by using the Erase function.

1. To erase the configuration, from the Maintenance menu Settings Backup link, click the Erase

button on the screen.

2. The router will then reboot automatically.

After an erase, the router's password will be password, the LAN IP address will be

192.168.0.1, and the router's DHCP client will be enabled.

Note: To restore the factory default configuration settings without knowing the login password or

IP address, you must use the Default Reset button on the rear panel of the router. See “DG834GT

Rear Panel“ on page 2-9.

Upgrading the Router’s Firmware

The software of the DG834GT Super W ireless ADSL Router is stored in FLASH memory, and can be upgraded as new software is released by NETGEAR.

Upgrade files can be downloaded from NETGEAR's Web site. If the upgrade file is compressed (.ZIP file), you must first extract the binary (.BIN or.IMG) file before uploading it to the router.

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How to Upgrade the Router Firmware

Note: NETGEAR recommends that you back up your config uration before doing a firmware

upgrade. After the upgrade is complete, you may need to restore your configuration settings.

1. Download and unzip the new software file from NETGEAR.

The Web browser used to upload new firmware into the router must support HTTP uploads. NETGEAR recommends using Microsoft Internet Explorer 5.0 or above, or Netscape Navigator 4.7 or above.

2. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

3. From the Main Menu of the browser interface, under the Maintenance heading, select the

Router Upgrade heading to display the menu shown in Figure 6-2.

Figure 6-2: Router Upgrade menu

In the Router Upgrade menu, click the Browse to locate the binary (.BIN or.IMG) upgrade file.

5. Click Upload.

Note: When uploading software to the router, it is important not to interrupt the Web

browser by closing the window, clicking a link, or loading a new page. If the browser is interrupted, it may corrupt the software. When the upload is complete, your router will automatically restart. The upgrade process will typically take about one minute. In some cases, you may need to clear the configuration and reconfigure the router after upgrading.

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Network Management Information

The DG834GT provides a variety of status and usage information which is discussed below.

Viewing Router Status and Usage Statistics

From the Main Menu, under Maintenance, select Router Status to view the screen in Figure 6-3 .

Figure 6-3: Router Status screen

The Router Status menu provides status and usage information. This screen shows the following parameters:

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Table 6-1. Menu 3.2 - Router Status Fields

Field Description

Account Name The Host Name assigned to the router in the Basic Settings menu. Firmware Version This field displays the router firmware version. ADSL Port These parameters apply to the Internet (ADSL) port of the router.

MAC Address This field displays the Ethernet MAC address bein g used by the Internet

(ADSL) port of the router.

IP Address This field displays the IP address being used by the Internet (ADSL) port

of the router. If no address is shown, the router cannot connect to the Internet.

DHCP If None, the router will use a fixed IP address on the ADSL.

If Client, the router will obtain an IP address dynamically from the ISP.

IP Subnet Mask This field displays the IP Subnet Mask being used by the Internet (ADSL)

port of the router.

Domain Name Server (DNS) This field displays the DNS Server IP addresses being used by the

router. These addresses are usually obtained dynamically from the ISP.

LAN Port These parameters apply to the Local (ADSL) port of the router.

MAC Address This field displays the Ethernet MAC address being used by the Local

(LAN) port of the router.

IP Address This field displays the IP address being used by the Local (LAN) port of

the router. The default is 192.168.0.1.

DHCP If OFF, the router will not assign IP addresses to PCs on the LAN.

If ON, the router will assign IP addresses to PCs on the LAN.

IP Subnet Mask This field displays the IP Subnet Mask being used by the Local (LAN)

port of the router. The default is 255.255.255.0.

Modem These parameters apply to the Local (WAN) port of the router.

ADSL Firmware Version The version of the firmware. Modem Status The connection status of the modem. Downstream Speed The speed at which the modem is receiving data from the ADSL line. Upstream Speed The speed at which the modem is transmitting data to the ADSL line. VPI The Virtual Path Identifier setting. VCI The Virtual Channel Identifier setting.

Click the Show Statistics button to display router usage statistics, as shown in Figure 6-3 below:

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Figure 6-4: Router Statistics screen

This screen shows the following statistics:.

Table 6-1. Router Statistics Fields

Field Description

WAN, LAN, or Serial Port

Status The link status of the port. TxPkts The number of packets transmitted on this port since reset or manual clear. RxPkts The number of packets received on this port since reset or manual clear. Collisions The number of collisions on this port since reset or manual clear. Tx B/s The current line utilization—percentage of current bandwidth used on this port. Rx B/s The average line utilization for this port. Up Time The time elapsed since the last power cycle or reset.

Poll Interval Specifies the interval at which the statistics are updated in this window. Click Stop to

The statistics for the WAN (Internet), LAN (local), and Serial ports. For each port, the screen displays:

freeze the display.

Click the Connection Status button to display router connection status, as shown in Figure 6-5 and

Figure 6-6.

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Figure 6-5: Connection Status screen for Dynamic IP

Clicking the Renew button updates the status information. This screen shows the following statistics:

Table 6-1. Connection Status Fields for Dynamic IP

Field Description

IP Address The IP Address assigned to the WAN port by the ADSL Internet Service Provider. Subnet Mask The Network Mask assigned to the WAN port by the ADSL Internet Service Provider. Default Gateway The default gateway router assigned to the WAN port by the ADSL Internet Service

Provider. DHCP Server The DHCP server’s IP address. DNS Server The DNS server’s IP address. Lease Obtained Date and time the lease was obtained. Lease Expires Date and time the lease expires.

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An alternate view of the Connection Status screen is shown in Figure 6-6 below:

Figure 6-6: Connection Status screen for PPPoA

Clicking the Renew button updates the status information. This screen shows the following statistics:

Table 6-1. Connection Status Fields for PPPoA

Field Description

Connection Time The time elapsed since the last connection to the Internet via the ADSL port. Connecting to

Sender Negotiation ON or OFF Authentication ON or OFF IP Address The IP Address assigned to the WAN port by the ADSL Internet Service Provider. Network Mask The Network Mask assigned to the WAN port by the ADSL Internet Service Provider.

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Viewing Attached Devices

The Attached Devices menu contains a table of all IP devices that the router has discovered on the local network. From the Main Menu of the browser interface, under the Maintenance heading, select Attached Devices to view the table, shown in Figure 6-7:

Figure 6-7: Attached Devices menu

For each device, the table shows the IP address, Device Name if available, and the Ethernet MAC address. Note that if the router is rebooted, the table data is lost until the router rediscovers the devices. To force the router to look for attached devices, click the Refresh button.

Viewing, Selecting, and Saving Logged Information

The router will log security-related events such as denied incoming service requests, hacker probes, and administrator logins. If you enabled content filtering in the Block Sites menu, the Logs page can show you when someone on your network tries to access a blocked site. If you enabled e-mail notification, you will receive these logs in an e-mail message. If you do not have e-mail notification enabled, you can view the logs here.

An example of the logs file is shown below.

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Figure 6-8: Security Logs menu

Log entries are described in Table 6-1 below:

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Table 6-1. Security Log entry descriptions

Field Description

Date and Time The date and time the log entry was recorded. Description or

The type of event and what action was taken if any.

Action Source IP The IP address of the initiating device for this log entry. Source port and

interface

The service port number of the initiating device, and whether it

originated from the LAN or WAN Destination The name or IP address of the destination device or Web site. Destination port

and interface

The service port number of the destination device, and whether

it’s on the LAN or WAN.

Log action buttons are described in Table 6-2 below:

Table 6-2. Security Log action buttons

Field Description

Refresh Refresh the log screen. Clear Log Clear the log entries. Send Log Email the log immediately. Apply Apply the current settings. Cancel Clear the current settings.

Selecting What Information to Log

Besides the standard information listed above, you can choose to log additional information. Those optional selections are as follows:

• Attempted access to blocked site

• Connections to the Web-based interface of the router

• Router operation (start up, get time, etc.)

• Known DoS attacks and Port Scans

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Saving Log Files on a Server

You can choose to write the logs to a computer running a syslog program. To activate this feature, select to Broadcast on Lan or enter the IP address of the server where the Syslog file will be written.

Examples of Log Messages

Following are examples of log messages. In all cases, the log entry shows the timestamp as: Day, Year-Month-Date Hour:Minute:Second

Activation and Administration

Tue, 2002-05-21 18:48:39 - NETGEAR activated

[This entry indicates a power-up or reboot with initial time entry.]

Tue, 2002-05-21 18:55:00 - Administrator login successful - IP:192.168.0.2 Thu, 2002-05-21 18:56:58 - Administrator logout - IP:192.168.0.2

[This entry shows an administrator logging in and out from IP address 192.168.0.2.]

Tue, 2002-05-21 19:00:06 - Login screen timed out - IP:192.168.0.2

[This entry shows a time-out of the administrator login.]

Wed, 2002-05-22 22:00:19 - Log emailed

[This entry shows when the log was emailed.]

Dropped Packets

Wed, 2002-05-22 07:15:15 - TCP packet dropped - Source:64.12.47.28,4787,WAN Destination:134.177.0.11,21,LAN - [Inbound Default rule match]

Sun, 2002-05-22 12:50:33 - UDP packet dropped - Source:64.12.47.28,10714,WAN Destination:134.177.0.11,6970,LAN - [Inbound Default rule match]

Sun, 2002-05-22 21:02:53 - ICMP packet dropped - Source:64.12.47.28,0,WAN Destination:134.177.0.11,0,LAN - [Inbound Default rule match]

[These entries show an inbound FTP (port 21) packet, User Datagram Protocol (UDP) packet (port 6970), and Internet Control Message Protocol (ICMP) packet (port 0) being dropped as a result of the default inbound rule, which states that all inbound packets are denied.]

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Enabling Security Event E-mail Notification

In order to receive logs and alerts by e-mail, you must provide your e-mail information in the E-mail subheading:

Figure 6-9: E-mail menu

• Turn e-mail notification on. Select this check box if you want to receive e-mail logs and

alerts from the router.

• Send alerts and logs via email. Enter the name or IP address of your ISP’s outgoing (SMTP)

mail server (such as mail.myISP.com). You may be able to find this information in the configuration menu of your e-mail program. Enter the e-mail address to which logs and alerts are sent. This e-mail address will also be used as the From address. If you leave this box blank, log and alert messages will not be sent via e-mail.

• Send alert immediately. Select the corresponding check box if you would like immed iate

notification of a significant security event, such as a known attack, port scan, or attempted access to a blocked site.

• Send logs according to this schedule. Specifies how often to send the logs: Hourly, Daily,

Weekly, or When Full. – Day for sending log

Specifies which day of the week to send the log. Relevant when the log is sent weekly or daily.

– Time for sending log

Specifies the time of day to send the log. Relevant when the log is sent daily or weekly.

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If the Weekly, Daily or Hourly option is selected and the log fills up before the specified period, the log is automatically e-mailed to the specified e-mail address. After the log is sent, it is cleared from the router’s memory. If the router cannot e-mail the log file, the log buffer may fill up. In this case, the router overwrites the log and discards its contents.

Running Diagnostic Utilities and Rebooting the Router

The DG834GT Super Wireless ADSL Router has a diagnostics feature. You can use the diagnostics menu to perform the following functions from the router:

• Ping an IP Address to test connectivity to see if you can reach a remote host.

• Perform a DNS Lookup to test if an Internet name resolves to an IP address to verify that the DNS server configuration is working.

• Display the Routing Table to identify what other routers the router is communicating with.

• Reboot the router to enable new network configurations to take effect or to clear problems with the router’s network connection.

From the Main Menu of the browser interface, under the Maintenance heading, select the Router Diagnostics heading to display the menu shown in Figure 6-10.

Figure 6-10: Diagnostics menu

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Enabling Remote Management

Using the Remote Management page, you can allow a user or users on the Internet to configure, upgrade and check the status of your DG834GT 108 Mbps Super Wireless ADSL Router.

Note: Be sure to change the router's default password to a very secure password. The

ideal password should contain no dictionary words from a ny language, and should be a mixture of letters (both upper and lower case), numbers, and symbols. Your password can be up to 30 characters.

Configuring Remote Management

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

2. From the Advanced section of the main menu, select the Remote Management link.

3. Select the Turn Remote Management On check box.

4. Specify what external addresses will be allowed to access the router’s remote management.

For security, restrict access to as few external IP addresses as practical:

• To allow access from any IP address on the Internet, select Everyone.

• To allow access from a range of IP addresses on the Internet, select IP address range.

Enter a beginning and ending IP address to define the allowed range.

• To allow access from a single IP address on the Internet, select Only this Computer.

Enter the IP address that will be allowed access.

5. Specify the Port Number that will be used for accessing the management interface.

Web browser access normally uses the standard HTTP service port 80. For greater security, you can change the remote management Web interface to a custom port by entering that number in the box provided. Choose a number between 1024 and 65535, but do not use the number of any common service port. The default is 8080, which is a common alternate for HTTP.

6. Click Apply to have your changes take effect.

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When accessing your router from the Internet, you will type your router's WAN IP address in your browser's Address (in IE) or Location (in Netscape) box, followed by a colon (:) and th e custom port number. For example, if your external address is 134.177.0.123 and you use port number 8080, enter in your browser:

http://134.177.0.123:8080

Note: In this case, the http:// must be included in the address.

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Chapter 7

Advanced Configuration

This chapter describes how to configure the advanced features of your DG834G T 108 Mbps Super Wireless ADSL Router.

Configuring Advanced Security

The DG834GT 108 Mbps Super Wireless ADSL Router provides a variety of advanced features, such as:

• Setting up a Demilitarized Zone (DMZ) Server

• Connecting Automatically, as Required

• Disabling Port Scan and DOS Protection

• Responding to a Ping on the Internet WAN Port

•MTU Size

• Flexibility on configuring your LAN TCP/IP settings

• Using the Router as a DHCP Server

• Configuring Dynamic DNS

• Configuring Static Routes

These features are discussed below.

Setting Up A Default DMZ Server

The Default DMZ Server feature is helpful when using some online games and videoconferencing applications that are incompatible with NAT. The router is programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local computer can run the application properly if that computer’s IP address is entered as the Default DMZ Server.

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Note: For security reasons, you should avoid using the Default DMZ Server feature.

When a computer is designated as the Default DMZ Server, it loses much of the protection of the firewall, and is exposed to many exploits from the Internet. If compromised, the computer can be used to attack your network.

Incoming traffic from the Internet is normally discarded by the router unless the traffic is a response to one of your local computers or a service that you have configured in the Ports menu. Instead of discarding this traffic, you can have it forwarded to one computer on your network. This computer is called the Default DMZ Server.

How to Configure a Default DMZ Server

To assign a computer or server to be a Default DMZ server, follow these steps:

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever Password and LAN address you have chosen for the router.

2. From the Main Menu, under Advanced, click the WAN Setup link to view the page sho wn in

Figure 7-1:

Figure 7-1: WAN Setup Page

Select the Default DMZ Server check box.

4. Type the IP address for that server.

5. Click Apply to save your changes.

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Connect Automatically, as Required

Normally , this option should be enabled, so that an Internet connection will be made automatically , whenever Internet-bound traffic is detected. If this causes high connection costs, you can disable this setting.

If disabled, you must connect manually, using the sub-screen accessed from the "Connection Status" button on the Status screen.

If you have an "Always on" connection, this setting has no effect.

Disable Port Scan and DOS Protection

The Firewall protects your LAN against Port Scans and Denial of Service (DOS) attacks. This should be disabled only in special circumstances.

Respond to Ping on Internet WAN Port

If you want the router to respond to a 'ping' from the Internet, select the ‘Respond to Ping on Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows your router to be discovered. Do not select this box unless you have a specific reason to do so.

MTU Size

The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes, or 1492 Bytes for PPPoE connections. For some ISPs you may need to reduce the MTU. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection.

Configuring LAN IP Settings

The LAN IP Setup menu allows configuration of LAN IP services such as DHCP and RIP. These features can be found under the Advanced heading in the Main Menu of the browser interface.

The router is shipped preconfigured to use private IP addresses on the LAN side, and to act as a DHCP server. The router’s default LAN IP configuration is:

• LAN IP addresses—192.168.0.1

• Subnet mask—255.255.255.0

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These addresses are part of the Internet Engineering T ask Force (IETF)-designated private address range for use in private networks, and should be suitable in most applications. If your network has a requirement to use a different IP addressing scheme, you can make those changes in this menu.

Figure 7-2: LAN IP Setup Menu

The LAN TCP/IP Setup parameters are:

• IP Address This is the LAN IP address of the router.

• IP Subnet Mask This is the LAN Subnet Mask of the router. Combined with the IP address, the IP Subnet Mask allows a device to know which other addresses are local to it, and which must be reached through a gateway or router.

• RIP Direction RIP (Router Information Protocol) allows a router to exchange routing information with other routers. The RIP Direction selection controls how the Router sends and receives RIP packets. Both is the default.

— When set to Both or Out Only, the router will broadcast its routing table periodically. — When set to Both or In Only, it will incorporate the RIP information that it receives. — When set to None, it will not send any RIP packets and will ignore any RIP packets

received.

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• RIP Ve rsion This controls the format and the broadcasting method of the RIP packets that the router sends. It recognizes both formats when receiving. By default, this is set for RIP-1.

— RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you

have an unusual network setup.

— RIP-2 carries more information. Both RIP-2B and RIP-2M send the routing data in RIP-2

format. — RIP-2B uses subnet broadcasting. — RIP-2M uses multicasting.

Note: If you change the LAN IP address of the router while connected through the

browser, you will be disconnected. You must then open a new connection to the new IP address and log in again.

DHCP

By default, the router will function as a DHCP (Dynamic Host Configuration Protocol) server, allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to the router's LAN. The assigned default gateway address is the LAN address of the router. IP addresses will be assigned to the attached PCs from a pool of addresses specified in this menu. Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.

For most applications, the default DHCP and TCP/IP settings of the router are satisfactory. See “IP

Configuration by DHCP”on page B-9 for an explanation of DHCP and information about how to

assign IP addresses for your network.

Use Router as DHCP server

If another device on your network will be the DHCP server, or if you will manually configure the network settings of all of your computers, clear the ‘Use router as DHCP server’ check box. Otherwise, leave it selected.

Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP Address. These addresses should be part of the same IP address subnet as the router’s LAN IP address. Using the default addressing scheme, you should define a range between 192.168.0.2 and

192.168.0.254, although you may want to save part of the range for devices with fixed addresses.

The router will deliver the following parameters to any LAN device that requests DHCP:

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• An IP Address from the range you have defined

• Subnet Mask

• Gateway IP Address is the router’s LAN IP address

• Primary DNS Server, if you entered a Primary DNS address in the Basic Settings menu; otherwise, the router’s LAN IP address

• Secondary DNS Server, if you entered a Secondary DNS address in the Basic Settings menu

• WINS Server, short for Windows Internet Naming Service Server, determines the IP address associated with a particular Windows computer. A WINS server records and reports a list of names and IP address of Windows PCs on its local network. If you connect to a remote network that contains a WINS server, enter the server’s IP address here. This allows your PCs to browse the network using the Network Neighborhood feature of Windows.

Reserved IP addresses

When you specify a reserved IP address for a computer on the LAN, that computer will always receive the same IP address each time it access the router’s DHCP server. Reserved IP addresses should be assigned to servers that require permanent IP settings.

To reserve an IP address:

1. Click the Add button.

2. In the IP Address box, type the IP address to assign to the computer or server.

Choose an IP address from the router’s LAN subnet, such as 192.168.0.x.

3. Type the MAC Address of the computer or server.

Tip: If the computer is already present on your network, you can copy its MAC address from the Attached Devices menu and paste it here.

4. Click Apply to enter the reserved address into the table.

Note: The reserved address will not be assigned until the next time the computer contacts the router's DHCP server. Reboot the computer or access its IP configuration and force a DHCP release and renew.

To edit or delete a reserved address entry:

1. Click the button next to the reserved address you want to edit or delete.

2. Click Edit or Delete.

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How to Configure LAN TCP/IP Settings

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

2. From the Main Menu, under Advanced, click the LAN IP Setup link to view the men u, shown

in Figure 7-3:

Figure 7-3: LAN IP Setup Menu

Enter the TCP/IP, DHCP, or Reserved IP parameters.

4. Click Apply to save your changes.

Configuring Dynamic DNS

If your network has a permanently assigned IP address, you can register a domain name and have that name linked with your IP address by public Domain Name Servers (DNS). However, if your Internet account uses a dynamically assigned IP address, you will not know in advance what your IP address will be, and the address can change frequently. In this case, you can use a commercial dynamic DNS service that will allow you to register your domain to their IP address, and will forward traffic directed at your domain to your frequently-changing IP address.

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The router contains a client that can connect to a dynamic DNS service provider. To use this feature, you must select a service provider and obtain an account with them. After you have configured your account information in the router, whenever your ISP-assigned IP address changes, your router will automatically contact your dynamic DNS service provider, log in to your account, and register your new IP address.

How to Configure Dynamic DNS

1. Log in to the router at its default LAN address of http://192.168.0.1 with its default User Name

of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the router.

2. From the Main Menu of the browser interface, under Advanced, select Dynamic DNS to

display the page below.

Figure 7-4: Dynamic DNS menu

Access the Web site of one of the dynamic DNS service providers whose names appear in the ‘Service Provider’ box, and register for an account. For example, for dyndns.org, go to www.dyndns.org.

4. Select the “Use a dynamic DNS service” check box.

5. Select the name of your dynamic DNS Service Provider.

6. Type the Host Name that your dynamic DNS service provider gave you.

The dynamic DNS service provider may call this the domain name. If your URL is myName.dyndns.org, then your Host Name is “myName.”

7-8 Advanced Configuration

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NETGEAR DG834GT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

Contents

Audience, Conventions, Scope

How to Use this Manual

How to Print this Manual

About the Router

Key Features

802.11g Wireless Networking

A Powerful, True Firewall

Easy Installation and Management

Protocol Support

Content Filtering

Auto Sensing and Auto Uplink™ LAN Ethernet Connections

What’s in the Box?

The Router’ s Front Panel

The Router’s Rear Panel

What You Need Before You Begin

ADSL Microfilter Requirements

ADSL Microfilter

ADSL Microfilter with Built-In Splitter

Ethernet Cabling Requirements

Computer Hardware Requirements

LAN Configuration Requirements

Internet Configuration Requirements

Where Do I Get the Internet Configuration Parameters?

Record Your Internet Connection Information

Connecting the DG834GT to Your LAN

How to Connect the Router

Auto-Detecting Your Internet Connection Type

Wizard-Detected PPPoE Login Account Setup

Wizard-Detected PPPoA Login Account Setup

Wizard-Detected Dynamic IP Account Setup

Wizard-Detected IP Over ATM Account Setup

Wizard-Detected Fixed IP (Static) Account Setup

Testing Your Internet Connection

Manually Configuring Your Internet Connection

How to Perform Manual Configuration

Internet Connection Requires Login and Uses PPPoE

Internet Connection Requires Login and Uses PPPoA

Internet Connection Does Note Require A Login

ADSL Settings

Considerations for a Wireless Network

Observe Performance, Placement, and Range Guidelines

Implement Appropriate Wireless Security

Understanding Wireless Settings

How to Set Up and Test Basic Wireless Connectivity

How to Restricting Wireless Access to Your Network

Restricting Access to Your Network by Turning Off Wireless Connectivity

Restricting Wireless Access Based on the Wireless Network Name (SSID)

Restricting Wireless Access Based on the Wireless Station Access List

Choosing WEP Authentication and Security Encryption Methods

Authentication Type Selection

Encryption Choices

How to Configure WEP

How to Configure WPA-PSK

Protecting Access to Your DG834GT 108 Mbps Super Wireless ADSL Router

How to Change the Built-In Password

Changing the Administrator Login Timeout

Configuring Basic Firewall Services

Blocking Keywords, Sites, and Services

How to Block Keywords and Sites

Firewall Rules

Inbound Rules (Port Forwarding)

Inbound Rule Example: A Local Public Web Server

Inbound Rule Example: Allowing Videoconferencing

Considerations for Inbound Rules

Outbound Rules (Service Blocking)

Outbound Rule Example: Blocking Instant Messenger

Order of Precedence for Rules

Services

How to Define Services

Setting Times and Scheduling Firewall Services

How to Set Your Time Zone

How to Schedule Firewall Services

Backing Up, Restoring, or Erasing Your Settings

How to Back Up the Configuration to a File