Netgear DG834G Reference Guide

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ADSL2+ Modem Wireless Router DG834G Reference Manual

NETGEAR, Inc.

4500 Great America Parkway Santa Clara, CA 95054 USA

202-10269-01 September 2007

Trademarks

NETGEAR and the NETGEAR logo are trademarks of Netgear, Inc. Microsoft, Windows, and Windows NT are registered trademarks 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.

FCC Statement

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 rea sonable 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 instructions, may cause harmful 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 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. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device m ust acce pt a ny interference received, including

interference that may cause undesired operation. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could

void the user’s authority to operate this equipment. The radio module has been evaluated under FCC Bulletin OET 65C (01-01) and found to be compliant to the

requirements as set forth in CFR 47 Sections, 2.1093, and 15.247 (b) (4) addressing RF Exposure from radio frequency devices. This model meets the applicable government requirements for exposure to radio frequency waves.

This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. For product available in the USA market, only channels 1~11 can be operated. Selection of other channels is not possible

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.

v2.0, September 2007

European Union Statement of Compliance

Hereby, NETGEAR, Inc. declares that this modem router is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.

Èesky [Czech]

Dansk [Danish]

Deutsch [German]

Eesti [Estonian]

English

Español [Spanish]

Ελληνική [Greek]

NETGEAR, Inc. tímto prohlašuje, že tento 54 Mbps ADSL2+ Modem Wireless Router Model DG834G

ustanoveními smìrnice 1999/5/ES. Undertegnede

Modem Wireless Router Model DG834G

relevante krav i direktiv 1999/5/EF. Hiermit erklärt

Router Model DG834G

den übrigen einschlägigen Bestimmungen der Richtlinie 1999/5/EG befindet. Käesolevaga kinnitab

Router Model DG834G

direktiivist tulenevatele teistele asjakohastele sätetele. Hereby,

NETGEAR, Inc., declares that this 54 Mbps ADSL2+ Modem Wireless Router

Model DG834G

provisions of Directive 1999/5/EC. Por medio de la presente

Wireless Router Model DG834G

otras disposiciones aplicables o exigibles de la Directiva 1999/5/CE. ΜΕ ΤΗΝ ΠΑΡΟΥΣΑ

Router Model DG834G

ΤΙΣ ΛΟΙΠΕΣ ΣΧΕΤΙΚΕΣ ΔΙΑΤΑΞΕΙΣ ΤΗΣ ΟΔΗΓΙΑΣ 1999/5/ΕΚ.

je ve shodì se základními požadavky a dalšími pøíslušnými

NETGEAR, Inc. erklærer herved, at følgende udstyr 54 Mbps ADSL2+

overholder de væsentlige krav og øvrige

NETGEAR, Inc., dass sich das Gerät 54 Mbps ADSL2+ Modem Wi reless

in Übereinstimmung mit den grundlegenden Anforderungen und

NETGEAR, Inc. seadme 54 Mbps ADSL2+ Modem Wireless

vastavust direktiivi 1999/5/EÜ põhinõuetele ja nimetatud

is in compliance with the essential requirements and other relevant

NETGEAR, Inc. declara que el 54 Mbps ADSL2+ Modem

cumple con los requisitos esenciales y cualesquiera

NETGEAR, Inc. ΔΗΛΩΝΕΙ ΟΤΙ 54 Mbps ADSL2+ Modem W ireless

ΣΥΜΜΟΡΦΩΝΕΤΑΙ ΠΡΟΣ ΤΙΣ ΟΥΣΙΩΔΕΙΣ ΑΠΑΙΤΗΣΕΙΣ ΚΑΙ

Français [French]

Italiano [Italian]

Latviski [Latvian]

Lietuviø [Lithuanian]

Par la présente

Wireless Router Model DG834G

dispositions pertinentes de la directive 1999/5/CE. Con la presente

Wireless Router Model DG834G

disposizioni pertinenti stabilite dalla direttiva 1999/5/CE.

NETGEAR, Inc. deklarç, ka 54 Mbps ADSL2+ Modem Wireless Router Model

Ar šo

DG834G

noteikumiem.

NETGEAR, Inc. deklaruoja, kad šis 54 Mbps ADSL2+ Modem Wireless Router

Šiuo

NETGEAR, Inc. déclare que l'appareil 54 Mbps ADSL2+ Modem

est conforme aux exigences essentielles et aux autres

NETGEAR, Inc. dichiara che questo 54 Mbps ADSL2+ Modem

è conforme ai requisiti essenziali ed al l e al tre

atbilst Direktîvas 1999/5/EK bûtiskajâm prasîbâm un citiem ar to saistîtajiem

Model DG834G atitinka esminius reikalavimus ir kitas 1999/5/EB Direktyvos nuostatas.

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iii

Nederlands [Dutch]

Hierbij verklaart

Router Model DG834G

relevante bepalingen van richtlijn 1999/5/EG.

NETGEAR, Inc. dat het toestel 54 Mbps ADSL2+ Modem Wireless

in overeenstemming is met de essentiële eisen en de andere

Malti [Maltese]

Magyar [Hungarian]

Polski [Polish]

Português [Portuguese]

Slovensko [Slovenian]

Slovensky [Slovak]

Suomi [Finnish]

Hawnhekk,

Model DG834G

hemm fid-Dirrettiva 1999/5/EC. Alulírott,

Router Model DG834G

EC irányelv egyéb elõírásainak. Niniejszym

Model DG834G

postanowieniami Dyrektywy 1999/5/EC.

NETGEAR, Inc., jiddikjara li dan 54 Mbps ADSL2+ Modem Wireless Router

jikkonforma mal-tiijiet essenzjali u ma provvedimenti orajn relevanti li

NETGEAR, Inc. nyilatkozom, hogy a 54 Mbps ADSL2+ Modem Wireless

megfelel a vonatkozó alapvetõ követelményeknek és az 1999/5/

NETGEAR, Inc. oœwiadcza, ¿e 54 Mbps ADSL2+ Modem Wireless Router

jest zgodny z zasadniczymi wymogami oraz pozosta³ymi stosownymi

NETGEAR, Inc. declara que este 54 Mbps ADSL2+ Modem Wireless Router Model DG834G

1999/5/CE.

está conforme com os requisitos essenciais e outras disposições da Directiva

NETGEAR, Inc. izjavlja, da je ta 54 Mbps ADSL2+ Modem Wireless Router Model DG834G

ES.

v skladu z bistvenimi zahtevami in ostalimi relevantnimi doloèili direktive 1999/5/

NETGEAR, Inc. týmto vyhlasuje, že 54 Mbps ADSL2+ Modem Wireless Router Model DG834G

ES.

spåòa základné požiadavky a všetky príslušné ustanovenia Smernice 1999/5/

NETGEAR, Inc. vakuuttaa täten että 54 Mbps ADSL2+ Modem Wireless Router Model DG834G

direktiivin muiden ehtojen mukainen.

tyyppinen laite on direktiivin 1999/5/EY oleellisten vaatimusten ja sitä koskevien

Svenska [Swedish]

Härmed intygar de väsentliga egenskapskrav och övriga relevanta bestämmelser som framgår av direktiv 1999/5/EG.

NETGEAR, Inc. att denna [utrustningstyp] står I överensstämmelse med

A printed copy of the EU Declaration of Conformity certificate for this product is provided in the DG834G v4 product package.

Bestätigung des Herstellers/Importeurs

Es wird hiermit bestätigt, daß das 54 Mbps ADSL2+ Modem Wireless Router Model DG834G gemä ß der im BMPTAmtsblVfg 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.

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Certificate of the Manufacturer/Importer

It is hereby certified that the 54 Mbps ADSL2+ Modem W ireless Router Model DG834G 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 54 Mbps ADSL2+ Modem Wireless Router Model DG834G.

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.

Product and Publication Details

Model Number: DG834G v4 Publication Date: September 2007 Product Family: Modem Router Product Name: 54 Mbps ADSL2+ Modem Wireless Router Model DG834G Home or Business Product: Home Language: English Publication Part Number: 202-10269-01 Publication Version Number: 2.0

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ADSL2+ Modem Wireless Router DG834G Reference Manual

About This Manual

Conventions, Formats, and Scope ..................................................................................... i

How to Use This Manual ................................................................................................... ii

How to Print this Manual .................................................................................................... ii

Chapter 1 Configuring Your Internet Connection

Using the Setup Manual ................................................................................................1-1

What You Need Before You Begin ..................................................................................1-2

Logging In to the Modem Router ............................................................... .....................1-2

Auto-Detecting Your Internet Connection .......................................................................1-4

Viewing or Manually Configuring Your ISP Settings ........................................... .... ... ... ..1-6

Understanding the Basic Settings Screen ......................................................................1-7

ADSL Settings ..............................................................................................................1-10

How the Internet Connection Works ......................................................................1-10

Chapter 2 Wireless Configuration

Wireless Placement and Range Guidelines ...................................................................2-2

Viewing or Changing Wireless Settings ..........................................................................2-2

Wireless Security ............................. ...................................... .... ... ... ... .... ... ... ... ... .... ........2-5

Wireless Station Access Control ..............................................................................2-7

Restricting Access by MAC Address ........................................................................2-8

Configuring WEP ......................................................................................................2-9

Configuring WPA ....................................................................................................2-11

Chapter 3 Protecting Your Network

Protecting Access to Your ADSL2+ Modem Wireless Router ........................................3-1

Changing the Built-In Password ...............................................................................3-1

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Changing the Administrator Login Time-out .............................................................3-2

Configuring Basic Firewall Services ...............................................................................3-2

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

Blocking Keywords and Sites ...................................................................................3-3

Firewall Rules .................................................................................................................3-4

Instant Messaging (IM) Ports ...................................................................................3-5

Inbound Rules (Port Forwarding) .............................. ............................................... 3-6

Outbound Rules (Service Blocking) .........................................................................3-8

Order of Precedence for Rules ..............................................................................3-10

Services ................................. ................................................ .......................................3-10

Defining Services ...................................................................................................3-11

Setting Times and Scheduling Firewall Services ................................................ ..........3-11

Setting Your Time Zone ................... ... .... ... ... ... ... .... ... ... ... .... ... ................................3-12

Scheduling Firewall Services .................................................................................3-13

Chapter 4 Managing Your Network

Backing Up, Restoring, or Erasing Your Settings ...........................................................4-1

Backing Up the Configuration to a File .....................................................................4-1

Restoring the Configuration from a File ...................................................................4-2

Erasing the Configuration .........................................................................................4-2

Upgrading the Modem Router Firmware ........................................................................4-2

Upgrading the Modem Router Firmware ..................................................................4-3

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

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

Viewing Attached Devices ........................................................................................4-8

Viewing, Selecting, and Saving Logged Information ................................................4-9

Examples of Log Messages ...................................................................................4-11

Enabling Security Event E-mail Notification .................................................................4-12

Running Diagnostic Utilities and Rebooting the Modem Router ...................................4-13

Enabling Remote Management ....................................................................................4-14

Configuring Remote Management .........................................................................4-14

Chapter 5 Advanced Configuration

Advanced Settings ..........................................................................................................5-1

WAN Setup ............................ ... ....................................... ... ... .... ... ... ... ............................5-1

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Setting Up a Default DMZ Server .............................. ... ... .... ... ... ... .... ... ... ... ...............5-3

LAN IP Settings ..............................................................................................................5-4

DHCP Settings .........................................................................................................5-6

Reserved IP Addresses ...........................................................................................5-7

Dynamic DNS .................................................................................................................5-7

Configuring Dynamic DNS .......................................................................................5-8

Using Static Routes ........................................................................................................5-9

Static Route Example ...............................................................................................5-9

Configuring Static Routes .......................................................................................5-10

Universal Plug and Play (UPnP) ...................................................................................5-11

Wireless Bridging and Repeating .................................................................................5-13

Point-to-Point Bridge Configuration ........................................................................5-14

Multi-Point Bridge Configuration ............................................................................5-15

Repeater with Wireless Client Association ................................ ... .... ... ... ... ... .... ... ...5-16

Chapter 6 Virtual Private Networking

Overview of VPN Configuration ......................................................................................6-1

Client-to-Gateway VPN Tunnels ..............................................................................6-2

Gateway-to-Gateway VPN Tunnels .........................................................................6-2

Planning a VPN ..............................................................................................................6-3

VPN Tunnel Configuration ......................................................................... ... ... ... .... ... ... ..6-5

Setting Up a Client-to-Gateway VPN Configuration .......................................................6-5

Step 1: Configuring the Client-to-Gateway VPN Tunnel on the DG834G v4 ...........6-6

Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC ...........6-9

Setting Up a Gateway-to-Gateway VPN Configuration ................................................6-18

VPN Tunnel Control ..................... .... ... ... ... .... ... ... ... ... .... ...................................... .... ... ...6-25

Activating a VPN Tunnel ........................................................................................6-25

Verifying the Status of a VPN Tunnel .....................................................................6-28

Deactivating a VPN Tunnel ....... ... ... ... .... ................................................................6-30

Deleting a VPN Tunnel ...........................................................................................6-31

Setting Up VPN Tunnels in Special Circumstances ...................................... ............. ...6-32

Using Auto Policy to Configure VPN Tunnels ........................................................6-32

Using Manual Policy to Configure VPN Tunnels ....................................................6-41

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Chapter 7 Troubleshooting

Basic Functioning ...........................................................................................................7-1

Power LED Is Not On ...............................................................................................7-2

Power LED Is Red ....................................................................................................7-2

LAN or DSL or Internet Port LEDs Are Not On ........................................................7-2

Troubleshooting Access to the Modem Router Main Menu .................... ... ... ... ... .... ... ... ..7-3

Troubleshooting the ISP Connection ..............................................................................7-4

ADSL Link ................................................................................................................7-4

Obtaining a WAN IP Address .... ... ... .......................................... ... .... ........................7-5

Troubleshooting PPPoE or PPPoA .......................................................................... 7-6

Troubleshooting Internet Browsing ..........................................................................7-6

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

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

Testing the Path from Your Computer to a Remote Device .....................................7-8

Restoring the Default Configuration and Password ............... .........................................7-8

Using the Reset Button ............................................................................................7-9

Problems with Date and Time .........................................................................................7-9

Appendix A Technical Specifications

Appendix B NETGEAR VPN Configuration

DG834G v4 to FVL328 .................................................................................................. B-1

Configuration Profile .................................. ... ... ... .... ... ....................................... ... ... . B-1

Step-By-Step Configuration ....................... ... ... .......................................... ... .... ....... B-2

DG834G v4 with FQDN to FVL328 ............................................................................... B-6

Configuration Profile .................................. ... ... ... .... ... ....................................... ... ... . B-6

Step-By-Step Configuration ....................... ... ... .......................................... ... .... ....... B-7

Configuration Summary (Telecommuter Example) .......................................................B-11

Setting Up the Client-to-Gateway VPN Configuration (Telecommuter Example) ........ B-12

Step 1: Configuring the Client-to-Gateway VPN Tunnel on the VPN Router at the

Employer’s Main Office ......................................................................................... B-12

Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC at the

Telecommuter’s Home Office .................... ... ... ... .... ... ... ... ...................................... B-14

Monitoring the VPN Tunnel (Telecommuter Example) .................................. .......... ..... B-22

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Viewing the PC Client’s Connection Monitor and Log Viewer ............................... B-22

Viewing the VPN Router’s VPN Status and Log Information ................................ B-23

Appendix C Related Documents

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About This Manual

The NETGEAR® ADSL2+ Modem Wireless Router DG834G Reference Manual describes how to install, configure ,and troubleshoot the 54 Mbps ADSL2+ Modem Wireless Router Model DG834G. The information in this manual is intended for readers with intermediate computer and Internet skills.

Conventions, Formats, and Scope

The conventions, formats, and scope of this manual are described in the following paragraphs:

• Typographical Conventions. This manual uses the following typographical conventions:

Italic Emphasis, books, CDs, file and server names, extensions

Bold User input, IP addresses, GUI screen text

Fixed Command prompt, CLI text, code

italic URL links

• Formats. This manual uses the following formats to highlight special messages:

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

Tip: This format is used to highlight a procedure that will save time or resources.

Warning: Ignoring this type of note might result in a malfunction or damage to the

equipment.

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ADSL2+ Modem Wireless Router DG834G Reference Manual

• Scope. This manual is written for the ADSL2+ Modem Wireless Router according to these

specifications:

Product Version 54 Mbps ADSL2+ Modem Wireless Router Model DG834G Manual Publication Date September 2007

For more information about network, Internet, firewall, and VPN technologies, see the links to the NETGEAR website in Appendix C, “Related Documents”.

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

http://kbserver.netgear.com/products/DG834G v4.asp.

How to Use This Manual

The HTML version of this manual includes the following:

• Buttons, and , for browsing forward or backward through the manual one page at a time.

• A button that displays the table of contents and an button. Double-click on a link in the table of contents or index to navigate directly to where the topic is described in the manual.

• A button to access the full NETGEAR, Inc. online knowledge base for the product model.

• Links to PDF versions of the full manual and individual chapters.

How to Print this Manual

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

• Printing a page in the HTML view. Each page in the HTML version of the manual is dedicated to a major topic. Use the Print

button on the browser toolbar to print the page contents.

• Printing a chapter. Use the PDF of This Chapter link at the top left of any page.

v2.0, September 2007

ADSL2+ Modem Wireless Router DG834G Reference Manual

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

print. The PDF version of the chapter you were viewing opens in a browser window.

– Your computer must have the free Adobe Acrobat reader installed in order to view and

print PDF files. The Acrobat reader is available on the Adobe website at

http://www.adobe.com.

– 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 Complete PDF Manua l link at the top left of any page. – Click the Complete PDF Manual link at the top left of any page in the manual. The PDF

version of the complete manual opens in a browser window.

– 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.

iii

v2.0, September 2007

ADSL2+ Modem Wireless Router DG834G Reference Manual

v2.0, September 2007

Chapter 1

Configuring Your Internet Connection

This chapter describes how to configure your ADSL2+ Modem Wireless Router Internet connection. When you perform the initial configuration of your modem router using the DG834G

ADSL2+ Modem Wireless Router Resource CD as described in the NETGEAR Router Setup Manual, these settings are configured automatically for you. This chapter provides further details

about these settings, as well as instructions on how to log in to the modem router for further configuration.

Note: NETGEAR recommends using the Smart W izard on the DG834G ADSL2+ Modem

Wireless Router Resource CD for initial configuration, as described in the NETGEAR Router Setup Manual.

This chapter includes:

• “Using the Setup Manual ”

• “What You Need Before You Begin”

• “Logging In to the Modem Router”

• “Understanding the Basic Settings Screen”

• “ADSL Settings”

Using the Setup Manual

For first-time installation of your modem router, refer to the NETGEAR Router Setup Manual. The Setup Manual explains how to launch the NETGEAR Smart Wizard on the DG834G ADSL2+ Modem Wireless Router Resource CD to step you through the procedure to connect your router, modem, and computers. The Smart Wizard will assist you in configuring your wireless settings and enabling wireless security for your network. After initial configuration using the Setup Manual, you can use the information in this Reference Manual to configure additional features of your wireless router.

For installation instructions in a language other than English, see the language options on the

DG834G ADSL2+ Modem Wireless Router Resource CD.

1-1

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ADSL2+ Modem Wireless Router DG834G Reference Manual

What You Need Before You Begin

You need to prepare the following before you can set up your modem router:

• Active Internet service provided by an ADSL account.

• The Internet Service Provider (ISP) configuration information for your ADSL account. – ISP login name and password – ISP Domain Name Server (DNS) addresses – Fixed or static IP address – Host and domain names

• Depending on how your ISP set up your Internet account, you need to know one or more of these settings:

– Virtual path identifier (VPI) and Virtual channel identifier (VCI) parameters – Multiplexing method – Host and domain names

• ASDL microfilters as explained in the NETGEAR Router Setup Manual.

• Your computer must be set up to use DHCP to get its TCP/IP configuration from the modem router. This is usually the case. For help with DHCP, see the documentation that came with your computer, or see the link to the online document in “Preparing a Computer for Network

Access” in Appendix C.

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.

Logging In to the Modem Router

You can log in to the modem router to view or change its settings.

Note: Your computer must be configured for DHCP. For help with configuring DHCP, see

the documentation that came with your computer or see the link to the online document in “Preparing a Computer for Network Access” in Appendix C.

1-2 Configuring Your Internet Connection

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ADSL2+ Modem Wireless Router DG834G Reference Manual

To log in to the modem router:

1. Type http://routerlogin.net or http://192.168.0.1 in the address field of an Internet browser.

Figure 1-1

This login window opens:

Figure 1-2

2. Enter admin for the user name and password for the password, both in lower case letters.

3. Select Setup Wizard to go to the Setup Wizard screen:

Figure 1-3

Configuring Your Internet Connection 1-3

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ADSL2+ Modem Wireless Router DG834G Reference Manual

This screen includes the following:

• Country. It is important to specify the location where the modem router will operate so

that the Internet connection will work correctly.

• Language. You can select a language from the drop-down list.

• Auto-Detect Connection Type. If you want to change the settings for the Internet

connection, select Yes or No, and then click Next. – Yes. Let the modem router Setup Wizard auto-detect the type of Internet connection

that you have and configure it. See “Auto-Detecting Your Internet Connection”.

– No, I want to Configure the Router Myself. Enter your Internet settings manually in

the Basic Settings screen. See “Understanding the Basic Settings Screen” on page 1-7.

In either case, use the configuration settings that your ISP provided to assure that the configuration for your Internet connection is correct.

• Test. To test your Internet connection, click Test. If the NETGEAR website does not

appear within 1 minute, see Chapter 7, “Troubleshooting”.

Auto-Detecting Your Internet Connection

The Smart Setup Wizard searches your Internet connection for servers and protocols to determine your ISP configuration.

Note: The wizard cannot detect a PPTP connection with your ISP. If your ISP uses this

protocol, then you must configure your connection manually (see “Understanding

the Basic Settings Screen” on page 1-7).

To use the Smart Setup Wizard to assist with configuration or to view the Internet connection settings:

1. From the Setup Wizard screen, select Yes for the Auto-Detect Connection Type, and then click Next to proceed.

1-4 Configuring Your Internet Connection

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ADSL2+ Modem Wireless Router DG834G Reference Manual

The Setup Wizard detects your ISP configuration. Depending on the type of connection, you are prompted to enter your ISP settings, as shown in the following table.

Table 1-1. Auto-Detected Internet Connection Types

Connection Type ISP Information

PPP over Ethernet (PPPoE) PPP over ATM (PPPoA)

Dynamic IP Account Setup No entries needed. IP over ATM Classical IP

assignment (RFC1577)

Fixed IP (Static) Account Setup

Enter the login user name and password. These fields are casesensitive.

• Enter the assigned IP address, subnet mask, and 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 address. For a fixed IP address configuration, you must obtain DNS server addresses from your ISP and enter them manually here.

1. If required, enter the account name and domain name from

your ISP.

2. Select Use Static IP Address or Use IP Over ATM (IPoA —

RFC1483 Routed) according to the information from your ISP. If you select IPoA, the router will 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 modem router. This information should have been provided to you by your ISP.

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 address. For a fixed IP address configuration, you must obtain DNS server addresses from your ISP and enter them manually here.

www.netgear.com to a numeric IP

2. To save your settings, click Apply.

3. Click Test to verify your Internet connection. If you have trouble connecting to the Internet,

see Chapter 7, “Troubleshooting”.

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Viewing or Manually Configuring Your ISP Settings

NETGEAR recommends that you specify your country and language before you configure the settings on the Basic Settings screen. See “Logging In to the Modem Router” on page 1-2. You must install the ADSL filters and connect the modem router to the ADSL line as described in the NETGEAR Router Setup Manual before you configure the settings in the Basic Settings screen.

To view or configure the basic settings:

1. Log in to the modem router as described in “Logging In to the Modem Router”.

2. Select Basic Settings to display the Basic Settings screen.

The Basic Settings screen is explained in “Understanding the Basic Settings Screen” on

page 1-7.

3. Select Yes or No depending on whether your ISP requires a login. This selection changes the

fields available on the Basic Settings screen.

• Yes. If your ISP requires a login, select the encapsulation method. Enter the login name. If

you want to change the login time-out, enter a new value in minutes.

• No. If your ISP does not require a login, enter the account name, if required, and the

domain name, if required.

4. Enter the settings for the IP address and DNS server.

The default ADSL settings usually work fine. If you have problems with your connection, check the ADSL settings. See “ADSL Settings” for more details.

5. If no login is required, you can specify the MAC Address setting.

6. Click Apply to save your settings.

7. Click Test to test your Internet connection. If the NETGEAR website does not appear within

one minute, refer to Chapter 7, “Troubleshooting”.

Note: When your Internet connection is working you will no longer need to launch the

ISP’s login program on your computer to access the Internet. When you start an Internet application, your modem router automatically logs you in.

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Understanding the Basic Settings Screen

The fields on the Basic Settings screen depend on whether or not your Internet connection requires a login.

ISP does not require login ISP does require login

Figure 1-4

The following table explains the fields in the Basic Settings screen. Note that the group of fields included in this screen depends on whether or not a login is required

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Table 1-2. Basic Settings screen fields

Settings Description

Does Your ISP Require a Login? • Yes

•No

These fields appear only if no login is required.

These fields appear only if your ISP requires a login.

Internet IP Address • Get Dynamically from ISP. Your ISP use s DH CP to assign

Domain Name Server (DNS) Address Th e DNS server is used to look up site addresses based on

Account Name (If required)

Domain Name (If required)

Encapsulation • PPPoE

Idle Timeout (In minutes) If you want to change the login time-out, enter a new value in

Enter the account name provided by your ISP . This might also be called the host name.

Enter the domain name provided by your ISP.

• PPPoA

•PPTP

address.

minutes. This determines how long the modem router keeps the Internet connection active after there is no Internet activity from the LAN. Entering an Idle Timeout value of 0 (zero) means never log out.

your IP address. Your ISP automatically assigns these addresses.

• Use Static IP Add res s. 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 modem router to which your modem router will connect.

• Use IP Over AT M (IFo A) . Your ISP uses Classical IP addresses (RFC 1577). Enter the IP address, IP subnet mask, and gateway IP addresses that your ISP assigned.

their names.

• Get Automatically from ISP. Your ISP uses DHCP to assign your DNS servers. Your ISP automa tically assigns this address.

• Use These DNS Servers. If you know that your ISP does not automatically transmit DNS addresses to the modem router during login, select this option, and enter the IP address of your ISP’s primary DNS server. If a secondary DNS server address is available, enter it also.

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Table 1-2. Basic Settings screen fields (continued)

Settings Description

NAT (Net Address Translation) NAT automatically assigns private IP addresses (10.1.1.x) to

LAN-connected devices.

• Enable. Usually NAT is enabled.

• Disable. This disables NAT, but leaves the firewall active. Disable NAT only if you are sure that you do not require it. When NAT is disabled, only standard routing is performed by this router. Classical routing lets you directly manage the IP addresses that the DG834G v4 uses. Classical routing should be selected only by experienced users

• Disable Firewall. This disables the firewall in addition to disabling NAT. With the firewall disabled, the protections usually provided to your network are disabled.

This field appears only if no login is required.

Router MAC Address The Ethernet MAC address that will be used by the modem

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

• Use Default Address. Use the default MAC address.

• Use Computer MAC Address. The modem router will 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.

• Use This MAC Address. Enter the MAC address that you want to use.

*. Disabling NAT reboots the modem router and resets its configuration settings to the factory defaults. Disable NAT only if you

plan to install the modem router in a setting where you will be manually administering the IP address space on the LAN side of the router.

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ADSL Settings

Note: For information about how to install ADSL filters, see the NETGEAR Router Setup

Manual.

The default ADSL settings of your modem router 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: You must use the Setup Wizard to select the correct country for the default ADSL

settings to work.

If your ISP provided you with a multiplexing method or VPI/VCI number, then enter the setting:

1. From the main menu, select ADSL Settings.

2. In the Multiplexing Method drop-down list, 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 32 and 65535 for the VCI. The default is 35.

5. Click Apply.

How the Internet Connection Works

Your modem router is now configured to p r ovide Internet access for your network. Your modem 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. The modem router performs these functions automatically as needed.

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

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Chapter 2

Wireless Configuration

This chapter describes how to configure the wireless features of your ADSL2+ Modem Wireless Router. In planning your wireless network, consider the level of security required. Y ou should also select the physical placement of your modem router to maximize the network speed.

Note: If you are configuring the modem router from a wireless PC and you change the

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

For proper compliance and compatibility between similar products in your area, you must set the operating channel and region correctly.

Set up wireless features for the modem router in this order:

1. Connect the modem router, and get the Internet connection working, as described in

Chapter 1, “Configuring Your Internet Connection”. The modem router should work with an

Ethernet LAN connection before you set up the wireless features.

2. Plan the location for the modem router based on considerations in “W ireless Placement and

Range Guidelines”.

3. Enter the wireless settings, and verify wireless connectivity, as described in “Viewing or

Changing Wireless Settings”.

4. Implement wireless security, as described in “Wireless Security”.

For more information about wireless technology, see the link to the online document in “Wireless

Communications” in Appendix C.

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Wireless Placement and Range Guidelines

The range of your wireless connection can vary significantly based on the physical placement of the modem router. The latency , data th roughput performance, and n otebook power consumption of wireless adapters also vary depending on your configuration choices.

For best results, place your modem router according to the following guidelines:

• Near the center of the area in which your PCs will operate.

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

• Away from sources of interference, such as PCs, microwave ovens, and 2.4 GHz cordless phones.

• Away from large metal surfaces.

• Put the antenna in a vertical position to provide the best side-to-side coverage. Put the antenna in a horizontal position to provide the best up-and-down coverage.

• If using multiple access points, it is better if adjacent access points use different radio frequency channels to reduce interference. The recommended channel spacing between adjacent access points is 5 channels (for example, use Channels 1 and 6, or 6 and 11).

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.

Viewing or Changing Wireless Settings

You can view or change the wireless settings for the modem router. If you want to make changes, make sure to note the current settings first.

Note: If you use a wireless computer to change the wireless settings, you will be

disconnected when you click Apply. Reconfigure your wireless computer to match the new settings, or access the modem router from a wired computer to make further changes.

1. Log in to the modem router 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 user name, password, and LAN address you have chosen for the modem router.

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2. Select Wireless Settings from the main menu to display the Wireless Settings screen:

Figure 2-1

The settings for this screen are explained in Table 2-1.

3. Select the region in which the modem router will operate.

4. For initial configuration and test, leave the other settings unchanged.

5. To save your changes, click Apply.

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6. Configure and test your computers for wireless connectivity. Program the wireless adapter of your computers to have the same SSID and wireless security

settings as your modem router. Check that they have a wireless link and are able to obtain an IP address by DHCP from the modem router. If there is interference, adjust the channel.

Table 2-1. Wireless Settings

Settings Description

Wireless Network

Wireless Access Point

Name (SSID) The SSID is also known as the wireless network name.

Enter a 32-character (maximum) name in this field. This field is case-sensitive. In a setting where there is more than one wireless network, different wireless network names provide a means for separating the traffic. Any device you want to participate in a

wireless network must use the SSID. Region The location where the modem router is used. Channel The wireless channel used by the gateway. The default is

Channel 6.

Do not change the wireless channel unless you experience

interference (shown by lost connections or slow data

transfers). If this happens, you might need to experiment

with different channels to see which is the best. Mode The default is g & b, which allows both 802.11g and 802.1 1b

wireless stations access. Note that in b only mode, 802.11g

wireless stations can connect if they can operate in 802.1 1b

mode. Enable Wireless Access

Point

Allow Broadcast Name (SSID)

Wireless Isolation This feature is disabled by default. If it is enabled, wireless

Selected by default, this setting enables the wireless radio,

which allows the modem router to work as a wireless

access point.

Turning off the wireless radio can be helpful for

configuration, network tuning, or troubleshooting.

Selected by default, the modem router broadcasts its SSID,

allowing wireless stations that have a null (blank) SSID to

adopt the correct SSID. If you disable broadcast of the

SSID, only devices with the correct SSID can connect. This

nullifies the wireless network discovery feature of some

products such as Windows XP, but the data is still fully

exposed to a determined snoop using specialized test

equipment like wireless sniffers. For this reason NETGEAR

recommends that you also enable wireless security.

stations cannot communicate with each other or with

stations on the wired network.

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Table 2-1. Wireless Settings (continued)

Settings Description

Wireless Station Access List

Security Options • Disabled. You can use this setting to establish wireless

Turn Access Control On Access control is disabled by default so that any computer

configured with the correct SSID can connect. See

“Restricting Access by MAC Address”.

connectivity before implementing wireless security. NETGEAR strongly recommends that you implement wireless security.

• WEP (Wired Equivalent Privacy). WEP security uses encryption keys and data encryption for data security. You can select 64-bit or 128-bit encryption. See “Configuring

WEP”.

• WPA2-PSK (Wi-Fi Protected Access Pre-Shared Key). Allow only computers configured with WPA2-PSK security to connect to the modem router. See “Configuring WPA”.

• WPA-PSK + WPA2-PSK. Allow computers configured with either WPA-PS K or WPA2-PSK security to connect to the modem router. See “Configuring WPA”.

• WPA-802.1x and WPA2-802.1. Wi-Fi Protected Access (WPA) with user authentication implemented using IEE

802.1x and Radius servers. See “Configuring WPA”.

Wireless Security

Indoors, computers can connect over 802.1 1g wireless networks at a maximum range of up to 30 0 feet. Such distances can allow for others outside 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 ADSL2+ Modem Wireless Router provides highly effective security features which are covered in detail in this chapter. Deploy the security features appropriate to your needs.

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

Figure 2-2

• Restrict Access Based on MAC Address. You can allow only trusted PCs to connect so that

unknown PCs cannot wirelessly connect to the modem router. 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.

• 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 block all but the most determined eavesdropper. This data encryption mode has been superseded by WPA-PSK and WPA2-PSK.

• WPA-802.1x, WPA2-802.1x. Wi-Fi Protected Access (WPA) with user authentication

implemented using IEE 802.1x and RADIUS servers.

• WPA-PSK (TKIP), WPA2-PSK (AES). Wi-Fi Protected Access (WPA) using a pre-shared

key to perform authentication and generate the initial data encryption keys. The very strong authentication along with dynamic per frame re-keying of WPA makes it virtually impossible to compromise.

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Wireless Station Access Control

By default, any wireless PC that is configured with the correct SSID and wireless security settings is allowed access to your wireless network. You can use Wireless Access Point settings in the Wireless Setting screen to further restrict wireless access to your network:

Figure 2-3

• Turning off wireless connectivity completely.

You can completely turn off the wireless portion of the modem router. For example, if you use your notebook computer to wirelessly connect to your router, an d 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 can still use the router. To do this, clear the Enable Wireless Access Point check box on the Wireless Settings screen, and then click Apply.

• Hiding your wireless network name (SSID).

By default, the modem router is set to broadcast its wireless network name (SSID). You can restrict wireless access to your network by not broadcasting the wireless network name (SSID). To do this, clear the Allow Broadcast of Name (SSID) check box on the Wireless Settings screen, and then click Apply. Wireless devices will not “see” your modem router. You must configure your wireless devices to match the wireless network name (SSID) of the modem router.

Note: The SSID of any wireless access adapters must match the SSID you configure

in the modem router. If they do not match, you will not get a wireless connection to the modem router.

• Restricting access by MAC address.

See “Restricting Access by MAC Address”.

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Restricting Access by MAC Address

For increased security, you can restrict access to the wireless network to allow only specific PCs based on their MAC addresses. You can restrict access to only trusted PCs so that unknown PCs cannot wirelessly connect to the ADSL2+ Modem Wireless Router. MAC address filtering adds an obstacle against unwanted access to your network, but the data broadcast over the wireless link is fully exposed.

To res t rict access based on MAC addresses:

Note: If you configure the modem router from a wireless computer, add your

computer’s MAC address to the access list. Otherwise you will lose your wireless connection when you click Apply. You must then access the modem router from a wired computer, or from a wireless computer that is on the access control list, to make any further changes.

2. From the main menu, select Wireless Settings, and then click Setup Access List to display the Wireless Station Access List screen.

Figure 2-4

The trusted wireless stations listed on this screen are the wireless clients that will have access to the wireless network when the list is enabled.

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3. Adjust the list as needed for your network. You can add devices to the Trusted Wi reless Stations list using either of the following methods:

• If the computer is in the Available Wireless Stations table, select the radio button of that

computer to capture its MAC address.

• Use the Add New Station Manually fields to enter the MAC address of the device to be

added. The MAC address can usually be found on the bottom of the wireless device.

Note: If no device name appears when you enter the MAC address, you can type a

descriptive name for the computer that you are adding.

4. Click Add, and then click Apply to save these settings. Now, only devices on this list will be allowed to wirelessly connect to the modem router.

Configuring WEP

Note: If you use a wireless computer to configure wireless security settings, you will be

disconnected when you click Apply. Reconfigure your wireless computer to match the new settings, or access the modem router from a wired computer to make further changes.

To configure WEP data encryption:

2. From the main menu, select Wireless Settings to display the Wireless Settings screen.

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3. In the Security Options section, select the WEP (Wired Equivalent Privacy) radio button:

Figure 2-5

4. Select the Authentication Type: Automatic, Open System, or Shared Key. The default is Open System.

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

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

5. Select the Encryption Strength setting:

• WEP (Wired Equivalent Privacy) 64-bit encryption. Enter 10 hexadecimal digits (any

combination of 0–9, a–f, or A–F).

• WEP (Wired Equivalent Privacy) 128-bit encryption. Enter 26 hexadecimal digits (any

combination of 0–9, a–f, or A–F).

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:

• Passphrase. To use a passphrase to generate the keys, enter a passphrase, and click

Generate. This automatically creates the keys. Wireless stations must use the passphrase or keys to access the modem router.

Note: Not all wireless adapters support passphrase key generation.

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• Key 1-Key4. These values are not case-sensitive. You can manually enter the four data

encryption keys. These values must be identical on all computers and access points in your network. Enter 10 hexadecimal digits (any combination of 0

–9, a–f, or A–F).

7. Select which of the four keys will be the default. Data transmissions are always encrypted using the default key. The other keys can be used

only to decrypt received data. The four entries are disabled if WP A-PSK or WPA authentication is selected.

8. Click Apply to save your settings.

Configuring WPA

WPA-PSK data encryption provides data security. The very strong authentication along with dynamic per frame rekeying of WPA makes it virtually impossible to compromise.

Not all wireless adapters support Wi-Fi Protected Access (WPA). Consult the product documentation for your wireless adapter for instructions for configuring WPA settings.

Note: If you use a wireless computer to configure wireless security settings, you will be

disconnected when you click Apply. Reconfigure your wireless computer to match the new settings, or access the modem router from a wired computer to make further changes.

To configure WPA in the modem router:

1. Log in to the modem router 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 user name, password, and LAN address you have chosen for the modem router.

2. Select Wireless Settings from the main menu.

3. On the Wireless Setting screen, select the radio button for the WPA or WPA2 option of your

choice.

4. The settings displayed on the screen depend on which security option you select.

5. For WPA-PSK or WPA2-PSK, enter the passphrase.

6. If prompted, enter the settings for the Radius server. These settings are required for

communication with the primary Radius server . You can configure a secondary Radius server, which is used if the primary Radius server fails.

• Primary Radius Server IP Address. The IP address of the Radius server. The default is

0.0.0.0

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• Radius Port. Port number of the Radius server. The default is 1812.

• Shared Key. This is shared between the wireless access point and the Radius server

during authentication.

7. To save your settings, click Apply.

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Chapter 3

Protecting Your Network

This chapter describes how to use the basic firewall features of the ADSL2+ Modem Wireless Router to protect your network.

Protecting Access to Your ADSL2+ Modem Wireless Router

For security reasons, the modem router has its own user name and password. Also, after a period of inactivity for a set length of time, the administrator login automatically disconnects. When prompted, enter admin for the modem router user name and password for the modem router password. You can use procedures in the following sections to change the modem router password and the amount of time for the administrator’s login time-out.

Note: The user name and password are not the same as a user name or password you

might 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.

Changing the Built-In Password

1. Log in to the modem 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 modem router.

Figure 3-1

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2. From the main menu, under the Maintenance heading, select Set Password to display the Set Password screen:

Figure 3-2

3. 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 must log in again to continue the

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

Changing the Administrator Login Time-out

For security, the administrator login to the modem router configuration times out after a period of inactivity. To change the login time-out period:

1. In the Set Password screen, type a number in the 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 in the following sections.

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Blocking Keywords, Sites, and Services

The modem router provides a variety of options for blocking Internet-based content and communications services. With its content filtering feature, the modem router prevents objectionable content from reaching your PCs. You can control access to Internet content by screening for keywords within Web addresses. 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. 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 following section explains how to configure your

modem router to perform these

functions.

Blocking Keywords and Sites

The modem router allows you to restrict access to Internet content based on Web addresses and Web address keywords.

1. Log in to the modem router 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 password and LAN address you have chosen for the modem router.

2. On the main menu, select Block Sites to display the Block Sites screen:

Figure 3-3

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3. To enable keyword blocking, select one of the following:

• Per Schedule. Turn on keyword blocking according to the settings on the Schedule

screen.

• Always. Turn on keyword blocking all the time, independent of the setting in the Schedule

screen.

4. Enter a keyword or domain in the Keyword field, click Add Keyword, and then click Apply. Some examples of keyword applications are shown in the following chart.

Keyword Result

XXX Block the URL http://www.badstuf.com/xxx.html. .com Only websites with other domain suffixes (such as .edu or .gov) can be

viewed.

. ( a period) Block all Internet browsing access.

Up to 32 entries are supported in the Keyword list.

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

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

and then 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.

7. Click Apply to save your settings.

Firewall Rules

Firewall rules 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.

The default inbound and outbound rules of the

• 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.

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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” for more details.

To view or change firewall rules, select Firewall Rules on the main menu.

Figure 3-4

• 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 a rule to a different position in the tabl e, select its button, and then click Move. At the prompt, enter the number of the desired new position, and then click OK.

Instant Messaging (IM) Ports

In addition to the handling of rules for inbound and outbound services, the Firewall Rules screen provides options for the handling of instant messaging (IM) ports. By default, IM ports are open. If you select the Close IM Ports option, instant messaging will be effectively disabled on your local area network.

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Inbound Rules (Port Forwarding)

Because the modem router uses Network Address Translation (NAT), your network presents only one IP address to the Internet, and outside users cannot directly access any of your local computers. However, by defining an inboun d 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 modem router to direct inbound traffic for a particular service to one local server based on the destination port number. This is also known as port forwarding.

Note: Some broadband ISP accounts do not allow you to run any server processes (such

as a Web or FTP server) from your location. Y our ISP might period ically check for servers and might suspend your account if it discovers any active services at your location. If you are unsure, see the acceptable use policy of your ISP.

Remember that allowing inbound services opens holes in your firewall. Enable only 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 outside IP addresses to the IP address of your Web server at any time of day. This rule is shown in the following figure:

Figure 3-5

The settings 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 screen to add any additional services or applications that do not already appear.

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• Action. Select when 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 screen.

• 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.

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

– 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 rule will be logged. – Not match. Traffic of this type that does not match the rule will be logged.

Inbound Rule Example: Allowing Videoconferencing

You can create an inbound rule to allow incoming videoconferencing to be initiated from a restricted range of outside IP addresses, such as from a branch office. In this example, CU-SeeMe connections are allowed only from a specified range of external IP addresses. This example also specifies logging of any incoming CU-SeeMe requests that do not match the allowed parameters.

Figure 3-6

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Considerations for Inbound Rules

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

If the IP address of the local server computer is assigned by DHCP, it might 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 previous example). Attempts by local computers to access the server using the external WAN IP address will fail.

Outbound Rules (Service Blocking)

The modem router 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 the following:

• 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)

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 screen. You can also have the modem router log any attempt to use Instant Messenger during that blocked period.

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The following screen shows AIM selected in the Service list:

Figure 3-7

The Outbound Services screen includes the following fields:

• Service. Select the application or service from the drop-down list to be allowed or blocked. You can use the Add Custom Service feature to add any additional services or applications that are not in the list; see “Defining Services” for details.

• Action. Choose when you want this type of traffic to be handled. You can block or allow always, or you can block or allow according to the schedule defined in the Schedule screen.

• LAN users. This setting 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 fill in the Start and Finish fields. – Single address. Enter the required address in the Start field.

• WAN users. This setting determines which packets are covered by the rule, based on their destination WAN IP address. Select the option that you want:

• Log. 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 rule will be logged. – Not match. Traffic of this type that does not match the rule will be logged.

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Order of Precedence for Rules

As you define new rules, they are added to the tables in the Firewall Rules screen, as shown:

Figure 3-8

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 might 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 RFC 1700, “Assigned Numbers.” Service numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of the application.

Although the modem router already holds a list of many service port numbers, you are not limited to these choices. Use the following procedure to define your own services.

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Defining Services

To define a service:

1. Log in to the modem 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 modem router.

2. Under the Security heading, select Services to display the Services screen:

Figure 3-9

• To create a new service, click Add Custom Service.

• T o edit an existing service, select its button on the left side of the table, and then click Edit

Service.

• To delete an existing service, select its button on the left side of the table, and then click

Delete Service.

3. Use the screen shown in the following figure to define or edit a service.

Figure 3-10

4. Click Apply to save your changes.

Setting Times and Scheduling Firewall Services

The modem router uses network time protocol (NTP) to obtain the current time and date from one of several network time servers on the Internet.

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Setting Your Time Zone

To localize the time for your log entries, you must specify your time zone:

2. On the main menu, select Schedule to display the Schedule screen:

Figure 3-11

3. 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.

If your time zone is currently in daylight savings time, select the Adjust for daylight savings

time check box.

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 causes 1 hour to be added to the standard time.

4. The modem router has a list of NETGEAR NTP servers. If you prefer to use a particular NTP server as the primary server, enter its IP address in the Use this NTP Server field.

5. Click Apply to save your settings.

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Scheduling Firewall Services

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

2. On the main menu, select the Schedule. The Schedule screen appears.

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, fill in the Start Blocking and End Blocking fields.

4. Enter the values in 24-hour time format. For example, 10:30 a.m. would be 10 hours and 30 minutes, and 10:30 p.m. 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.

5. Click Apply to save your changes.

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Chapter 4

Managing Your Network

This chapter describes how to perform network management tasks with your ADSL2+ Modem Wireless Router.

Backing Up, Restoring, or Erasing Your Settings

The configuration settings of the modem router are stored in a configuration file in the modem 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.

Backing Up the Configuration to a File

1. Log in to the modem 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 modem router.

2. Under the Maintenance heading on the main menu, select Backup Settings to display the Backup Settings screen:

Figure 4-1

3. Click Backup to save a copy of the current settings.

4. Store the .cfg file on a computer on your network.

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Restoring the Configuration from a File

To rest ore the configuration:

2. Under the Maintenance heading on the main menu, select Backup Settings.

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

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

5. The modem router reboots.

Erasing the Configuration

You can use the Erase feature to erase its configuration settings and restore the modem router to the factory default settings.

To erase the configuration:

1. Under the Maintenance heading on the main menu select, Backup Settings.

2. Click Erase.

3. The modem router reboots.

After an erase, the modem router password is password, the LAN IP address is 192.168.0.1, and the modem router DHCP client is enabled.

Note: To restore the factory default configuration settings when you do not know the

Upgrading the Modem Router Firmware

The software of the modem router is stored in flash memory, and can be upgraded as new software is released by NETGEAR. Upgrade files can be downloaded from the NETGEAR website. If the upgrade file is compressed (a .zip file), you must first extract the binary (.bin or .img) file before uploading it to the modem router.

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Upgrading the Modem Router Firmware

NETGEAR recommends that you back up your configuration before doing a firmware upgrade. After the upgrade is complete, you might 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 modem router must support HTTP

uploads. NETGEAR recommends using Microsoft Internet Explorer 5.0 or later, or Netscape Navigator 4.7 or later.

2. Log in to the modem 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 modem router.

3. From the main menu, under the Maintenance heading, select Router Upgrade to display the Firmware Upgrade screen:

Figure 4-2

4. Click Browse to locate the binary (.bin or .img) upgrade file.

5. Click Upload.

Warning: When uploading software to the modem 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 might corrupt the software. When the upload is complete, your modem router will automatically restart. The upgrade process typically takes about 1 minute. In some cases, you might need to clear the configuration and reconfigure the modem router after upgrading.

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Network Management Information

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

Viewing Modem Router Status and Usage Statistics

From the main menu, below the Maintenance heading, select Router Status to view this screen.

Figure 4-3

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

Table 4-1. Modem Router Status Fields

Field Description

Account Name The host name assigned to the modem router in the Basic

Settings screen.

Firmware Version This field displays the modem router firmware version.

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Table 4-1. Modem Router Status Fields (continued)

Field Description

ADSL Port MAC Address The Ethernet MAC address used by the ADSL port of the

modem router.

IP Address The IP address used by the ADSL port. If no address is

shown, the modem router cannot connect to the Internet.

Network Type The network type is determined by your ISP. Common

network types are PPPoE and PPPoA. IP Subnet Mask The IP subnet mask used by the ADSL port. Domain Name Server

(DNS)

LAN Port MAC Address The Ethernet MAC address used by the local (LAN) port of the

IP Address The IP address used by the local (LAN) port. The default is

DHCP • Off: The modem router will not assign IP addresses to PCs

IP Subnet Mask The IP subnet mask used by the local (LAN) port. The default

Modem ADSL Firmware

Version Modem Status The connection status of the modem. Downstream Speed The speed at which the modem is receiving data from the

Upstream Speed The speed at which the modem is transmitting data to the

VPI The virtual path identifier setting. VCI The virtual channel identifier setting.

The DNS server IP addresses used by the modem router.

These addresses are usually obtained dynamically from the

ISP.

modem router.

192.168.0.1.

on the LAN.

• On: The modem router assigns IP addresses to PCs on the LAN.

is 255.255.255.0. The version of the firmware.

ADSL line.

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Table 4-1. Modem Router Status Fields (continued)

Field Description

Wireless Port These are set in the Wireless Settings page; see

“Viewing or Changing Wireless Settings” in Chapter 2.

Name (SSID) The service set ID, also known as the wireless network name. Region The country where the unit is set up for use. Channel The current channel, which determines the operating

frequency.

Wireless AP Indicates if the access point feature is disabled or not. If not

enabled, the Wireless LED on the front panel will be off.

Broadcast Name Indicates if the DG834G v4 is configured to broadca s t its

SSID.

Viewing Statistics

Click the Show Statistics button on the Router Status screen to display modem router usage statistics:

Figure 4-4

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This following table explains the statistic fields.

Table 4-2. Router Statistics Fields

Field Description

WAN or LAN Port The statistics for the WAN (Internet) and LAN ports.

ADSL Link Downstream or Upstream These statistics might help your technical support representative if there is a connection problem.

Connection Status

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. Connection Speed Typically, the downstream speed is faster than the upstream

speed. Line Attenuation The line attenuation increases the further you are physically

located from your ISP’s facilities. Noise Margin This is the signal-to-noise ratio and is a measure of the quality

of the signal on the line. Poll Interval Specifies the interval at which the statistics are updated in this

window. Click Stop to freeze the display.

Click the Connection Status button on the Router Status screen to view the connection status:

Figure 4-5

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This screen shows the following statistics:

Table 4-3. 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.

The connection status.

Viewing Attached Devices

The Attached Devices screen contains a table of all IP devices that the modem router has discovered on the local network. From the main menu, under the Maintenance heading, select Attached Devices. The Attached Devices screen displays:

Figure 4-6

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

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Viewing, Selecting, and Saving Logged Information

The modem router logs security-related events such as denied incoming service requests, hacker probes, and administrator logins. If you enabled content filtering in the Block Sites screen, the Logs screen can show you when someone on your network tries to access a blocked site. If you enabled e-mail notification, you 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 in the following figure:

Figure 4-7

Log entries are described in the following table.

Table 4-4. Security Log Entry Descriptions

Field Description

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

action

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

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Table 4-4. Security Log Entry Descriptions

Field Description

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

interface Destination The name or IP address of the destination device or website. Destination port and

interface

The service port number of the initiating device, and whether it originated from the LAN or WAN.

The service port number of the destination device, and whether it is on the LAN or WAN.

Log action buttons are described in the following table.

Table 4-5. 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 th e current settings.

Selecting Which Information to Log

Besides the standard information listed previously, 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 modem router

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

• Known DoS attacks and port scans

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 the Broadcast on LAN radio button or enter the IP address of the server where the syslog file will be written.

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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 e-mailed.]

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

To receive logs and alerts by e-mail, you must provide your e-mail information in the E-mail screen:

Figure 4-8

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

alerts from the modem router.

• Send alerts and logs via email. – Send To This E-mail Address. Enter the e-mail address where you want to send the alerts

and logs. Use a full e-mail address, such as ChrisXY@myISP.com.

– Outgoing Mail Server . Enter the name or IP address of the outgoing SMTP mail server of

your ISP (such as mail.myISP.com).

– My Mail Server requires authentication. Select this check box if you need to log in to

your SMTP server to send E-mail. If you select this feature, you must enter the user name and password for the mail server.

Tip: If you cannot remember this information, check the settings in your

e-mail program.

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

– Time for sending log. Specifies the time of day to send the log. Relevant when the log is

sent daily or weekly.

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 modem router’s memory. If the modem router cannot e-mail the log file, the log buffer might fill up. In this case, the modem router overwrites the log and discards its contents.

Running Diagnostic Utilities and Rebooting the Modem Router

The modem router has a diagnostics feature. You can use the Diagnostics screen to perform the following functions from the modem router:

• Ping an IP address to test connectivity to see if you can reach a remote host. If Ping VPN is enabled, the ping packet always goes through the VPN if the VPN tunnel is enabled and working.

• 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 modem routers the modem router is communicating with.

• Reboot the modem router to enable new network configurations to take effect or to clear problems with the modem router’s network connection.

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From the main menu, under the Maintenance heading, select Modem Router Diagnostics to display the Diagnostics screen:

Figure 4-9

Enabling Remote Management

Using the Remote Management screen, you can allow a user or users on the Internet to configure, upgrade, and check the status of your modem router.

Tip: Be sure to change the modem router default password to a very secure password.

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

Configuring Remote Management

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2. Under the Advanced heading of the main menu, select Remote Management to display the Remote Management screen:

Figure 4-10

3. Select the Turn Remote Management On check box.

4. Specify which external addresses will be allowed to access the modem 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 a llow 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 field 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 modem router from the Internet, you will type your modem router WAN IP address in your Internet browser address or location field, followed by a colon (:) and the custom port number. For example, if your external address is 134.177.0.123 and you use port number 8080, enter:

http://134.177.0.123:8080

Note: In this case, you must include http:// in the address.

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Chapter 5

Advanced Configuration

This chapter describes how to configure the advanced features of your ADSL2+ Modem Wireless Router.

Advanced Settings

The ADSL2+ Modem Wireless Router provides a variety of advanced features, such as the following:

•WAN Setup.

• LAN TCP/IP settings

• Using the Router as a DHCP Server

• Configuring Dynamic DNS

• Configuring Static Routes.

• Wireless Bridging and Repeating

These features are discussed in the following sections of this chapter.

WAN Setup

To view or change the WAN Setup:

1. Log in to the modem router 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 password and LAN address you have chosen for the modem router.

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2. From the main menu, select WAN Setup to display the WAN Setup screen:

Figure 5-1

3. Make the changes that you want, and then click Apply to save the settings.

The WAN Setup fields are described in the following table:

Ta ble 5-1. WAN Setup Settings

Setting Description

Connect Automatically, as Required

Enable PPPOE-RELAY If this check box is selected, this feature allows a PPPoE client on a

Disable Port Scan and DOS Protection

Default DMZ Server This featur e is sometimes helpful when you are using some online

Usually, this check box is selected, so that an Internet connection is 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 screen accessed from the Connection Status button on the Router Status screen.

• If you have an “Always on” connection, this setting has no effect.

local PC to a remote PPPoE server with the gateway acting as a relay agent.

This check box is usually clear so that the firewal l protects your LAN against port scans and denial of service (DOS) attacks. This check box should be selected only in special circumstances.

games and videoconferencing. Be careful when using this featur e because it makes the firewall security less effective. See “Setting Up a

Default DMZ Server” on page 5-3.

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Ta ble 5-1. WAN Setup Settings

Setting Description

ADSL2+ Modem Wireless Router DG834G Reference Manual

Respond to Pin on Internet WAN Port

MTU Size (in bytes) The normal MTU (Maximum Transmit Unit) value for most Ethernet

If you want the modem router to respond to a ping from the Internet, select this check box. This should be used only as a diagnostic tool, since it allows your modem router to be discovered. Do not select this check box unless you have a specific reason to do so.

networks is 1500 bytes, or 1492 Bytes for PPPoE connections. For some ISPs you might need to reduce the MTU. This is rarely required, and should not be done unless you are sure it is necessary for your ISP connection.

Setting Up a Default DMZ Server

Warning: 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.

The default DMZ server feature is helpful when you are using some online games and videoconferencing applications that are incompatible with NAT . The modem 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.

Incoming traffic from the Internet is normally discarded by the modem router unless the traffic is a response to one of your local computers or a service that you have configured in the Ports screen. Instead of discarding this traffic, you can have it forwarded to one computer on your network. This computer is called the default DMZ server.

To assign a computer or server to be a default DMZ server:

1. Go to the WAN Setup screen as described in the previous section.

2. Select the Default DMZ Server check box.

3. Type the IP address for that server.

4. Click Apply to save your changes.

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LAN IP Settings

The LAN IP Setup screen allows configuration of LAN IP services such as DHCP and RIP. These features can be found under the Advanced heading in the modem router main menu.

The modem router is shipped preconfigured to use private IP addresses on the LAN side, and to act as a DHCP server. The modem router default LAN IP configuration is:

• LAN IP addresses: 192.168.0.1

• Subnet mask: 255.255.255.0 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 screen.

To view or change the LAN IP Setup:.

Warning: If you change the LAN IP address of the modem router while connected

through the browser, you will be disconnected and so will others connected to the router. To connect to the router, you must open a new connection to the new IP address and log in again. Others using the router must restart their computers to connect to the router again.

1. Select LAN IP to display the LAN IP Setup screen:

Figure 5-2

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2. Change the settings. For more information, see Table 5-2, “DHCP Settings” on page 5-6 or

“Reserved IP Addresses” on page 5-7.

3. Click Apply to save the changes. The LAN TCP/IP Setup parameters are explained in the following table.

Table 5-2. LAN IP Setup

Settings Description

LAN TCP/IP Setup

DHCP Server For more information, see

“DHCP Settings” on page 5-6.

Address Reservation For more information, see “DHCP Settings” on

page 5-6.

IP Address The LAN IP address of the modem router. IP Subnet Mask The LAN subnet mask of the modem router. Combined with

RIP Direction RIP (Router Information Protocol) allows a modem router to

RIP Version This controls the format and the broadcasting method of the

Use Router as a DHCP Server

Starting IP Address Specify the start of the range for the pool of IP addresses in

Ending IP Address Specify the end of the range for the pool of IP addresses in

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 modem router.

exchange routing information with other routers. This setting controls how the modem router sends and rece ives RIP packets. Both is the default.

• Both or Out Only. The modem router broadcasts its routing table periodically.

• Both or In Only. The modem router incorporates the RIP information that it receives.

• None. The modem router will not send any RIP packets and will ignore any RIP packets received.

RIP packets that the modem router se nd s. It reco gn i zes both formats when receiving. By default, this is RIP-1.

• RIP-1 is universally supported. It is 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.

This check box is usually selected so that the modem router functions as a Dynamic Host Configuration Protocol (DHCP) server. See “DHCP Settings” on page 5-6.

the same subnet as the modem router.

the same subnet as the modem router. When you specify a reserved IP address for a computer on

the LAN, that computer receives the same IP address each time it access the router’s DHCP server . Assign reserved IP addresses to servers that require permanent IP settings.

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DHCP Settings

By default, the modem router functions as a Dynamic Host Configuration Protoco l (DHCP) server , allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to the modem router’s LAN. The assigned default gateway address is the LAN address of the router. IP addresses is assigned to the attached PCs from a pool of addresses specified in this screen. 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 the online document listed in “Internet Networking and TCP/IP Addressing” in Appendix C 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 on the LAN IP Setup screen. Otherwise, leave it selected.

Specify the pool of IP addresses to be assigned by filling in the Starting IP Address and Ending IP Address fields. 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 might want to save part of the range for devices with fixed addresses.

The router delivers the following parameters to any LAN device that requests DHCP:

• 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 screen; otherwise, the router’s LAN IP address.

• Secondary DNS server, if you entered a secondary DNS address in the Basic Settings screen.

• WINS Server (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.

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Reserved IP Addresses

When you specify a reserved IP address for a computer on the LAN, that computer always receives 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 addre ss:

1. Click the Add button.

2. In the IP Address field, 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 screen 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 reserve d addre ss entry:

1. Click the button next to the reserved address you want to edit or delete.

2. Click Edit or Delete.

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 to register your domain to their IP address, and 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.

Configuring Dynamic DNS

Warning: If your ISP assigns a private WAN IP address such as 192.168.x.x or 10.x.x.x,

the Dynamic DNS service will not work because private addresses will not be routed on the Internet.

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, select Dynamic DNS to display the Dynamic DNS screen:

Figure 5-3

3. Access the website of one of the Dynamic DNS service providers whose names appear in the Service Provider drop-down list, 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.

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6. Fill in the Host Name, User Name, and Password fields. The dynamic DNS service provider may call the host name a domain name. If your URL is

myName.dyndns.org, then your host name is myName. The password can be a key for your dynamic DNS account.

7. If your dynamic DNS provider allows the use of wildcards in resolving your URL, you can select the Use wildcards check box to activate this feature.

For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the same IP address as yourhost.dyndns.org.

8. Click Apply to save your configuration.

Using Static Routes

Static routes provide additional routing information to your router. Under normal circumstances, the router has adequate routing information after it has been configured for Internet access, and you do not need to configure additional static routes. You must configure static routes only for unusual cases such as multiple routers or multiple IP subnets located on your network.

Static Route Example

As an example of when a static route is needed, consider the following case:

• Your primary Internet access is through a cable modem to an ISP.

• You have an ISDN router on your home network for connecting to the company where you are employed. This router’s address on your LAN is 192.168.0.100.

• Your company’s network is 134.177.0.0.

When you first configured your router, two implicit static routes were created. A default route was created with your ISP as the modem router, and a second static route was created to your local network for all 192.168.0.x addresses. With this configuration, if you attempt to access a device on the 134.177.0.0 network, your router forwards your request to the ISP. The ISP forwards your request to the company where you are employed, and the request is likely to be denied by the company’s firewall.

In this case you must define a static route, telling your router that 134.177.0.0 should be accessed through the ISDN router at 192.168.0.100. The static route would look like Figure 5-5.

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In this example:

•The Destination IP Address and IP Subnet Mask fields specify that this static route applies to all 134.177.x.x addresses.

•The Modem Router IP Address fields specifies that all traffic for these addresses should be forwarded to the ISDN router at 192.168.0.100.

•In the Metric field, a value of 1 will work since the ISDN router is on the LAN. This represents the number of routers between your network and the des tination. This is a direct connection, so it is set to 1.

• Private is selected only as a precautionary security measure in case RIP is activated.

Configuring Static Routes

1. Log in to the router 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 user name, password and LAN address you have chosen for the router.

2. From the main menu, under the Advanced heading, select Static Routes to view the Static Routes screen:

Figure 5-4

3. Click Add or Edit to display the following screen:

Figure 5-5

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4. Fill in or change the fields:

• Route Name. The route name is for identification purposes only.

• Private. Select this check box if you want to limit access to the LAN only.

The static route will not be reported in RIP.

• Active. Select this check box to make this route effective.

• Destination IP Address, and IP Subnet Mask. If the destination is a single host, type a

subnet value of 255.255.255.255.

• Gateway IP Address. This must be a router on the same LAN segment as the modem

router.

• Metric. Type a number between 2 and 15. This represents the number of routers between

your network and the destination. Usually, a setting of 2 or 3 works, but if this is a direct connection, set it to 2.

5. Click Apply to either save your changes. If you added a static route, it is added to the Static Routes screen.

Universal Plug and Play (UPnP)

Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers, access the network and connect to other devices as needed. UPnP devices can automatically discover the services from other registered UPnP devices on the network.

1. Select UPnP on the main menu to display the UPnP screen:

Figure 5-6

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2. Fill in the settings on the UPnP screen:

• T urn UPnP On. UPnP can be enabled or disabled for automatic device configuration. The

default setting for UPnP is enabled. If disabled, the modem router will not allow any device to automatically control the resources, such as port forwarding (mapping), of the modem router.

• Advertisement Period. The advertisement period is how often the modem router

advertises (broadcasts) its UPnP information. This value can range from 1 to 1440 minutes. The default period is for 30 minutes. Shorter durations ensure that control points have current device status at the expense of additional network traffic. Longer durations might compromise the freshness of the device status but can significantly reduce network traffic.

• Advertisement Time To Live. The time to live for the advertisement is measured in hops

(steps) for each UPnP packet sent. A hop is the number of steps allowed to propagate for each UPnP advertisement before it disappears. The number of hops can range from 1 to

255. The default value for the advertisement time to live is 4 hops, which should be fine for most home networks. If you notice that some devices are not being updated or reached correctly, then it might be necessary to increase this value a little.

• UPnP Portmap Table. The UPnP Portmap Table displays the IP address of each UPnP

device that is currently accessing the modem router and which ports (internal and external) that device has opened. The UPnP Portmap Table also displays what type of port is opened and if that port is still active for each IP address.

3. To sa ve, cancel your changes, or refresh the table:

• Click Apply to save the new settings to the modem router.

• Click Cancel to disregard any unsaved changes.

• Click Refresh to update the portmap table and to show the active ports that are currently

opened by UPnP devices.

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Wireless Bridging and Repeating

You can build large bridged wireless networks by using the modem router to configure a wireless distribution system (WDS).

Here are some examples of wireless bridged configurations:

• Point-to-Point bridge. The modem router communicates with another bridge-mode wireless station. See “Point-to-Point Bridge Configuration”.

• Multi-Point bridge. The modem router is the “master” for a group of bridge-mode wireless stations. Then all traffic is sent to this “master,” rather than to other access points. See “Multi-

Point Bridge Configuration”.

• Repeater with wireless client association. Sends all traffic to the remote access point. See

“Repeater with Wireless Client Association”.

Note: The wireless bridging and repeating feature uses the default security profile to send

and receive traffic.

To view or change these configurations, select Advanced Wireless Settings from the main menu:

Figure 5-7

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Point-to-Point Bridge Configuration

In Point-to-Point Bridge mode, the DG834G v4 modem router communicates as an access point with another bridge-mode wireless station. As a bridge, wireless client associations are disabled— only wired clients can be connected. You must enter the MAC address of the other bridge-mode wireless station in the field provided. Use wireless security to protect this communication.

The following figure shows an example of Point-to-Point Bridge mode.

Internet

192.168.0.1

PC’s

LAN Segment 1

Both APs (access points) are in

Point-to-Point Bridge mode.

AP 1 (DG834v3 Modem Router)

LAN Segment 2

AP 2

Switch or hub

PC’s

Figure 5-8

To set up a point-to-point bridge configuration (shown in Figure 5-8):

1. Configure the DG834G v4 modem router (AP 1) on LAN Segment 1 in Point-to-Point Bridge mode.

2. Configure the other access point (AP 2) on LAN Segment 2 in Point-to-Point Bridge mode. The DG834G v4 modem router must have AP 2’s MAC address in its Remote MAC Address

field, and AP 2 must have the DG834G v4’s MAC address in its Remote MAC Address field.

3. Configure and verify the following for both access points:

• Both APs must use the same SSID, channel, authentication mode, if any, and security

settings if security is in use.

4. Disable the DHCP server on AP2. AP1 will then be the DHCP server.

5. Verify connectivity across LAN Segment 1 and LAN Segment 2.

A computer on either LAN segment should be able to connect to the Internet or share files and printers of any other PCs or servers connected to LAN Segment 1 or LAN Segment 2.

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Multi-Point Bridge Configuration

Multi-Point Bridge mode allows a modem router to bridge to multiple peer access points simultaneously. As a bridge, wireless client associations are disabled—only wired clients can be connected. Multi-Point Bridge mode configuration includes the following steps:

• Entering the MAC addresses of the other access points in the fields provided.

• Setting the other bridge-mode access points to Point-to-Point Bridge mode, using the MAC address of this DG834G v4 as the Remote MAC Address.

• Using wireless security to protect this traffic.

The figure below shows an example of a Multi-Point Bridge mode configuration.

The DG834v4 is AP 1, which is the “Master AP” in Point-to-Multi-Point Bridge mode.

Internet

DG834v4

AP 1

192.168.0.1

PCs

LAN Segment 1

Point-to-Point Bridge Mode

AP 2

Hub or switch

LAN Segment 2

Point-to-Point Bridge Mode

AP 3

Hub or switch

LAN Segment 3

PCs

Figure 5-9

To set up the multi-point bridge configuration shown in Figure 5-9:

1. Configure the operating mode of the modem routers.

• Because it is in a central location, configure the DG834G v4 modem router (AP 1) on

LAN Segment 1 in Point-to-Multi-Point Bridge mode and enter the MAC addresses of AP 2 and AP 3 in the Remote MAC Address 1 and Remote MAC Address 2 fields.

PCs

• Configure the access point (AP2) on LAN Segment 2 in Point-to-Point Bridge mode with

the remote MAC address of the DG834G v4 modem router.

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• Configure the access point (AP3) on LAN Segment 3 in Point-to-Point Bridge mode with

the remote MAC address of the DG834G v4 modem router.

2. Disable the DHCP server on AP2 and AP3. AP1 will then be the DHCP server.

3. Verify the following for all access points:

• The LAN network configuration of the modem router and other access points are

configured to operate in the same LAN network address range as the LAN devices.

• Only one AP, the DG834G v4 modem rou ter in Figure 5-9, is configured in Point-to-

Multi-Point Bridge mode; all the others are in Point-to-Point Bridge mode.

• All APs, including the DG834G v4 modem router, must be on the same LAN. That is, all

the AP LAN IP addresses must be in the same network.

• If using DHCP, all access points should be set to Obtain an IP address automatically

(DHCP Client) in the IP Address Source section of the Basic IP Settings screen.

• All APs, including the DG834G v4 modem router, must use the same SSID, channel,

authentication mode, if any, and encryption in use.

• All point-to-point APs must have the MAC address of AP 1 (the DG834G v4 modem

router in the above diagram) in the Remote AP MAC address field.

4. Verify connectivity across the LANs.

• A computer on any LAN segment should be able to connect to the Internet or share files

and printers with any other PCs or servers connected to any of the three LAN segments.

Note: Wireless stations configured as they are in Figure 5-9 will not be able to connect to

the modem router or access points. If you require wireless stations to access any LAN segment, you can use additional access points configured in Wireless Access Point mode in any LAN segment.

Repeater with Wireless Client Association

In this mode, the ADSL2+ Modem Wireless Router sends all traffic to a remote AP. For Repeater mode, you must enter the MAC address of the remote “parent” access point. Alternatively, you can configure the ADSL2+ Modem Wireless Router as the parent by entering the address of a “child” access point. Note that the following restrictions apply:

•You do not have the option of disabling client associations with this ADSL2+ Modem Wireless Router.

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• You cannot configure a sequence of parent/child APs. You are limited to only one parent AP, although if the DG834G v4 is the parent AP it can connect with up to four child APs.

The following figure shows an example of a Repeater Mode configuration.

Wireless PC associated with AP 1

DG834G v4 Modem Router

Internet

192.168.0.1

PCs

AP 2 in Repeater mode

AP 3 in Repeater mode

Wireless PC associated with AP2

AP 1 (parent AP in Repeater mode)

Wireless PC associated with AP 3

Figure 5-10

To set up a repeater with wireless client association:

1. Configure the operating mode of the devices.

• Configure AP 1 the DG834G v4 modem router in the previ ous figure) on LAN Segment 1

with the MAC address of AP 2 and AP 3 in the first two Remote MAC Address fields.

• Configure AP 2 with the MAC address of AP 1 in the Remote MAC Address field.

• Configure AP 3 with the MAC address of AP 1 in the Remote MAC Address field.

2. Verify the following for both access points:

• The LAN network configuration of each AP is configured to operate in the same LAN

network address range as the LAN devices.

• The APs must be on the same LAN. That is, the LAN IP addresses for the APs must be in

the same network.

• If you are using DHCP, AP devices should be set to Obtain an IP address automatically

(DHCP Client) in the IP Address Source section of the Basic IP Settings screen.

• AP devices must use the same SSID, channel, authentication mode, and encryption.

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3. Verify connectivity across the LANs. A computer on any LAN segment should be able to connect to the Internet or share files and printers with any other PCs or servers connected to any of the three WLAN segments.

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Chapter 6

Virtual Private Networking

This chapter describes how to use the virtual private networking (VPN) features of the ADSL2+ Modem Wireless Router. VPN communicatio ns pa ths are called tunnels. VPN tunnels provide secure, encrypted communications between your local network and a remote network or computer. See “Virtual Private Networking (VPN)” in Appendix C to learn more about VPN.

This chapter is organized as follows:

• “Overview of VPN Configuration” on page 6-1 provides an overview of the two most common VPN configurations: client-to-gateway and gateway-to-gateway.

• “Planning a VPN” on page 6-3 provides a worksheet for recording the configuration parameters of the VPN you want to set up, along with the VPN Committee (VPNC) recommended default parameters set by the VPN Wizard.

• “VPN Tunnel Configuration” on page 6-5 summarizes the three ways to configure a VPN tunnel: VPN Wizard (recommended for most situations), Auto Policy, and Manual Policy.

• “Setting Up a Client-to-Gateway VPN Configuration” on page 6-5 provides the steps needed to configure a VPN tunnel between a remote PC and a network gateway using the VPN Wizard and the NETGEAR ProSafe VPN Client.

• “Setting Up a Gateway-to-Gateway VPN Configuration” on page 6-18 provides the steps needed to configure a VPN tunnel between two network gateways using the VPN Wizard.

• “VPN Tunnel Control” on page 6-25 provides the step-by-step procedures for activating, verifying, deactivating, and deleting a VPN tunnel once the VPN tunnel has been configured.

• “Setting Up VPN Tunnels in Special Circumstances” on page 6-32 provides the steps needed to configure VPN tunnels when there are special circumstances and the VPNC recommended defaults of the VPN Wizard are inappropriate. The two alternatives for configuring VPN tunnels are Auto Policy and Manual Policy.

Overview of VPN Configuration

Two common scenarios for configuring VPN tunnels are between a remote PC and a network gateway; and between two or more network gateways. The DG834G v4 supports both of these types of VPN configurations. The DG834G v4 supports up to five concurrent tunnels.

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Client-to-Gateway VPN Tunnels

Client-to-gateway VPN tunnels provide secure access from a remote PC, such as a telecommuter connecting to an office network.

Figure 6-1

A VPN client access allows a remote PC to connect to your network from any location on the Internet. In this case, the remote PC is one tunnel endpoint, running the VPN client software. The modem router on your network is the other tunnel endpoint. See “Setting Up a Client-to-Gateway

VPN Configuration” on page 6-5 to set up this configuration.

Gateway-to-Gateway VPN Tunnels

Gateway-to-Gateway VPN Tunnels provide secure access between networks, such as a branch or home office and a main office.

Figure 6-2

A VPN between two or more NETGEAR VPN-enabled routers is a good way to connect branch or home offices and business partners over the Internet. VPN tunnels also enable access to network resources across the Internet. In this case, use DG834G v4s on each end of the tunnel to form the VPN tunnel end points. See “Setting Up a Gateway-to-Gateway VPN Configuration” on page 6-18 for information about how to set up this configuration.

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Planning a VPN

When you set up a VPN, it is helpful to plan the network configuration and record the configuration parameters on a worksheet:

Table 6-1. VPN Tunnel Configuration Worksheet

Connection Name: Pre-Shared Key: Secure Association -- Main Mode or Manual Keys: Perfect Forward Secrecy -- Enabled or Disabled: Encryption Protocol -- DES or 3DES: Authentication Protocol -- MD5 or SHA-1:

Diffie-Hellman (DH) Group -- Group 1 or Group 2: Key Life in seconds:

IKE Life Time in seconds:

FQDN or Gateway IP

VPN Endpoint Local IPSec ID LAN IP Address Subnet Mask

(WAN IP Address)

To set up a VPN connection, you must configure each endpoint with specific identification and connection information describing the other endpoint. You must configure the outbound VPN settings on one end to match the inbound VPN settings on other end, and vice versa.

This set of configuration information defines a security association (SA) between the two VPN endpoints. When planning your VPN, you must make a few choices first:

• Will the local end be any device on the LAN, a portion of the local network (as defined by a subnet or by a range of IP addresses), or a single PC?

• Will the remote end be any device on the remote LAN, a portion of the remote network (as defined by a subnet or by a range of IP addresses), or a single PC?

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• Will either endpoint use fully qualified domain names (FQDNs)? FQDNs supplied by Dynamic DNS providers (see “Using a Fully Qualified Domain Name (FQDN)” on page B-7) can allow a VPN endpoint with a dynamic IP address to initiate or respond to a tunnel request. Otherwise, the side using a dynamic IP address must always be the initiator.

• Which method will you use to configure your VPN tunnels? – The VPN Wizard using VPNC defaults (see Table 6-2) – The typical automated Internet Key Exchange (IKE) setup (see “Using Auto Policy to

Configure VPN Tunnels” on page 6-32)

– A ma nual keying setup in which you must specify each phase of the connection (see

“Using Manual Policy to Configure VPN Tu nnels” on page 6-41)?

Table 6-2. Parameters Recommended by the VPNC and Used in the VPN Wizard

Parameter Factory Default

Secure Association Main Mode Authentication Method Pre-shared Key Encryption Method 3DES Authentication Protocol SHA-1 Diffie-Hellman (DH) Group Group 2 (1024 bit) Key Life 8 hours IKE Life Time 1 hour

• What level of IPSec VPN encryption will you use? – DES. The Da ta Encryption Standard (DES) processes input data that is 64 bits wide,

encrypting these values using a 56-bit key. Faster but less secure than 3DES.

– 3DES. Triple DES achieves a higher level of security by encrypting the data three times

using DES with three different, unrelated keys.

• What level of authentication will you use? – MDS. 128 bits, faster but less secure. – SHA-1. 160 bits, slower but more secure.

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VPN Tunnel Configuration

There are two tunnel configurations and three ways to configure them:

• Use the VPN Wizard to configure a VPN tunnel (recommended for most situations): – See “Setting Up a Client-to-Gateway VPN Configuration” on page 6-5. – See “Setting Up a Gateway-to-Gateway VPN Configuration” on page 6-18.

• See “Using Auto Policy to Configure VPN Tunnels” o n pag e 6-32 when the VPN Wizard and its VPNC defaults (see Table 6-2) are not appropriate for your special circumstances, but you want to automate the Internet Key Exchange (IKE) setup.

• See “Using Manual Policy to Configure VPN Tunnels” on page 6-41 when the VPN Wizard and its VPNC defaults (see Table 6-2) are not appropriate for your special circumstances and you must specify each phase of the connection. You manually enter all the authentication and key parameters. You have more control over the process; however, the process is more complex, and there are more opportunities for errors or configuration mismatches between your DG834G v4 and the corresponding VPN endpoint gateway or client workstation.

Note: NETGEAR publishes additional interoperability scenarios with various

gateway and client software products. Look on the NETGEAR website at

www.netgear.com for these interoperability scenarios.

Setting Up a Client-to-Gateway VPN Configuration

VPN Tunnel

22.23.24.25

DG834G

192.168.3.1

PCs

Figure 6-3

Setting up a VPN between a remote PC running the NETGEAR ProSafe VPN Client and a network gateway involves these two steps:

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• “Step 1: Configuring the Client-to-Gateway VPN Tunnel on the DG834G v4” on page 6-6 describes how to use the VPN Wizard to configure the VPN tunnel between the remote PC and network gateway.

• “Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC” on page 6-9 shows how to configure the NETGEAR ProSafe VPN Client endpoint.

Step 1: Configuring the Client-to-Gateway VPN Tunnel on the DG834G v4

Note: This section uses the VPN Wizard to set up the VPN tunnel using the VPNC

default parameters listed in T able 6-2 on page 6-4. If you have special requirements not covered by these VPNC-recommended parameters, refer to “Setting Up VPN

Tunnels in Special Circumstances” on page 6-32 to set up the VPN tunnel.

The worksheet in Table 6-3 identifies the parameters used in the following procedure. A blank worksheet is at “Planning a VPN”.

Table 6-3. VPN Tunnel Configuration Worksheet

Connection Name: RoadWarrior Pre-Shared Key: 12345678 Secure Association -- Main Mode or Manual Keys: Main Perfect Forward Secrecy -- Enabled or Disabled: Disabled Encryption Protocol -- DES or 3DES: 3DES Authentication Protocol -- MD5 or SHA-1: SHA-1 Diffie-Hellman (DH) Group -- Group 1 or Group 2: Group 2 Key Life in seconds: 28800 IKE Life Time in seconds: 3600 (1 hour)

VPN Endpoint Local IPSec ID LAN IP Address Subnet Mask

Client toDG834 — — Dynamic DG834G v4 toClient 192.168.3.1 255.255.255.0 22.23.24.25

(8 hours)

FQDN or Gateway IP

(WAN IP Address)

Follow this procedure to configure a client-to-gateway VPN tunnel using the VPN Wizard.

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1. Log in to the modem router at its LAN address of http://192.168.0.1 with its default user name of admin and password of password. On the main menu, select VPN Wizard. The VPN Wizard screen displays:

Figure 6-4

2. Click Next to proceed. Fill in the Connection Name and the pre-shared key fields. Select the radio button for the type of target end poin t, and then click Next to proceed.

Enter the new connection name, for example, 12345678.

Enter the pre-shared key.

Select the radio button: A remote VPN client (single PC).

Figure 6-5

Tip: The connection name is arbitrary and not relevant to how the configuration

functions.

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The Summary screen displays:

Figure 6-6

To view the VPNC-recommended authentication and encryption settings used by the VPN Wizard, click the here link. You can click Back to return to the Summary screen.

Figure 6-7

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3. Click Done on the Summary screen to complete the configuration procedure. The VPN Policies screen displays, showing that the new tunnel is enabled:

Figure 6-8

To view or modify the tunnel settings, select the radio button next to the tunnel entry and click

Edit.

Note: See “Using Auto Policy to Configure VPN Tunnels” on page 6-32 to enable the

IKE keepalive capability on an existing VPN tunnel.

Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC

This procedure describes how to configure the NETGEAR ProSafe VPN Client. These instructions assume that the PC running the client has a dynamically assigned IP address.

The PC must have the NETGEAR ProSafe VPN Client program installed that supports IPSec. Go to the NETGEAR website (http://www.netgear.com) for information about how to purchase the NETGEAR ProSafe VPN Client.

Note: Before installing the NETGEAR ProSafe VPN Client software, be sure to turn off

any virus protection or firewall software you might be running on your PC. You might need to insert your Windows CD to complete the installation.

1. Install the NETGEAR ProSafe VPN Client on the remote PC, and then reboot. a. Install the IPSec component. You might have the option to install either the VPN adapter

or the IPSec component or both. The VPN adapter is not necessary.

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If you do not have a modem or dial-up adapter installed in your PC, you might see the warning message stating “The NETGEAR ProSafe VPN Component requires at least one dial-up adapter be installed.” You can disregard this message.

b. Reboot the remote PC.

The ProSafe icon ( ) is in the system tray.

c. Double-click the ProSafe icon to open the Security Policy Editor.

2. Add a new connection. a. Run the NETGEAR ProSafe Security Policy Editor program, and, using the “VPN Tunnel

Configuration Worksheet” on page 6 - 6, create a VPN connection.

b. From the Edit menu of the Security Policy Editor, click Add, and then click Connection.

Figure 6-9

A New Connection listing appears in the list of policies. Rename the New Connection so that it matches the Connection Name field in the VPN Settings screen of the DG834G v4 on LAN A.

Note: In this example, the connection name used on the client side of the VPN

tunnel is toDG834, and it does not have to match the RoadWarrior connection name used on the gateway side of the VPN tunnel because connection names are irrelevant to how the VPN tunnel functions.

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Tip: Choose connection names that make sense to the people using and

administering the VPN.

c. Enter the following settings:

• Connection Security: Secure.

• ID Type: IP Subnet.

• Subnet: In this example, type 192.168.3.1 as the network address of the DG834G v4.

• Mask: Enter 255.255.255.0 as the LAN Subnet Mask of the DG834G v4.

• Protocol: Select All to allow all traffic through the VPN tunnel.

d. Select the Connect using Secure Gateway Tunnel check box. e. Select IP Address in the ID Type drop-down list. f. Enter the public WAN IP Address of the DG834G v4 in the field directly below the ID

Type drop-down list. In this example, 22.23.24.25 is used.

The resulting connection settings are shown in Figure 6-10.

3. Configure the security policy in the NETGEAR ProSafe VPN Client software: a. In the Network Security Policy list, expand the new connection by double-clicking its

name or clicking the + symbol. My Identity and Security Policy subheadings appear below the connection name.

b. Click the Security Policy subheading to view the Security Policy settings.

Figure 6-10

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c. In the Select Phase 1 Negotiation Mode section of the screen, select the Main Mode radio

button.

4. Configure the VPN client identity. In this step, you provide information about the remote VPN client PC. You must provide the

pre-shared key that you configured in the DG834G v4 and either a fixed IP address or a fixed virtual IP address of the VPN client PC.

a. In the Network Security Policy list on the left side of the Security Policy Editor window,

click My Identity.

Figure 6-11

b. In the Select Certificate drop-down list, select None. c. Select IP Address in the ID Type drop-down list. If you are using a virtual fixed IP

address, enter this address in the Internal Network IP Address field. Otherwise, leave this field empty.

d. In the Internet Interface section of the screen, select the adapter that you use to access the

Internet. If you have a dial-up Internet account, select PPP Adapter in the Name field. If you have a dedicated cable or DSL line, select your Ethernet adapter. If you will be switching between adapters or if you have only one adapter, select Any.

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e. In the My Identity section of the screen, click the Pre-Shared Key button. The Pre-Shared

Key screen displays:

Figure 6-12

f. Click Enter Key. Enter the DG834G v4 pre-shared key, and then click OK. In this

example, 12345678 is entered. This field is case-sensitive.

5. Configure the VPN Client Authentication Proposal. In this step, you provide the type of encryption (DES or 3DES) to be used for this connection.

This selection must match your selection in the DG834G v4 configuration. a. In the Network Security Policy list on the left side of the Security Policy Editor window ,

expand the Security Policy heading by double-clicking its name or clicking the + symbol.

b. Expand the Authentication subheading by double clicking its name or clicking the +

symbol. Then select Proposal 1 below Authentication.

Figure 6-13

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c. In the Authentication Method drop-down list, select Pre-Shared key. d. In the Encrypt Alg drop-down list, select the type of encryption that is configured for the

Encryption Protocol in the DG834G v4 in Table 6-3 on page 6-6. In this example, use Triple DES.

e. In the Hash Alg drop-down list, select SHA-1. f. In the SA Life drop-down list, select Unspecified. g. In the Key Group drop-down list, select Diffie-Hellman Group 2.

6. Configure the VPN client key exchange proposal.

In this step, you provide the type of encryption (DES or 3DES) to be used for this connection. This selection must match your selection in the DG834G v4 configuration.

a. Expand the Key Exchange subheading by double-clicking its name or clicking the +

symbol. Then select Proposal 1 below Key Exchange.

Figure 6-14

b. In the SA Life drop-down list, select Unspecified. c. In the Compression drop-down list, select None. d. Select the Encapsulation Protocol (ESP) check box. e. In the Encrypt Alg drop-down list, select the type of encryption that is configured for the

Encryption Protocol in the DG834G v4 in Table 6-3 on page 6-6. In this example, use Triple DES.

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Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

About This Manual

Conventions, Formats, and Scope

How to Use This Manual

How to Print this Manual

Using the Setup Manual

What You Need Before You Begin

Logging In to the Modem Router

Auto-Detecting Your Internet Connection

Viewing or Manually Configuring Your ISP Settings

Understanding the Basic Settings Screen

ADSL Settings

How the Internet Connection Works

Wireless Placement and Range Guidelines

Viewing or Changing Wireless Settings

Wireless Security

Wireless Station Access Control

Restricting Access by MAC Address

Configuring WEP

Configuring WPA

Protecting Access to Your ADSL2+ Modem Wireless Router

Changing the Built-In Password

Changing the Administrator Login Time-out

Configuring Basic Firewall Services

Blocking Keywords, Sites, and Services

Blocking Keywords and Sites

Firewall Rules

Instant Messaging (IM) Ports

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

Defining Services

Setting Times and Scheduling Firewall Services

Setting Your Time Zone

Scheduling Firewall Services

Backing Up, Restoring, or Erasing Your Settings

Backing Up the Configuration to a File

Restoring the Configuration from a File

Erasing the Configuration

Upgrading the Modem Router Firmware

Upgrading the Modem Router Firmware

Network Management Information

Viewing Modem Router Status and Usage Statistics

Viewing Statistics

Connection Status

Viewing Attached Devices

Viewing, Selecting, and Saving Logged Information

Selecting Which Information to Log

Saving Log Files on a Server

Examples of Log Messages

Activation and Administration

Dropped Packets

Enabling Security Event E-mail Notification

Running Diagnostic Utilities and Rebooting the Modem Router

Enabling Remote Management

Configuring Remote Management

Advanced Settings

WAN Setup

Setting Up a Default DMZ Server

LAN IP Settings

DHCP Settings

Use Router as DHCP Server

Reserved IP Addresses

Dynamic DNS

Configuring Dynamic DNS

Using Static Routes

Static Route Example

Configuring Static Routes

Universal Plug and Play (UPnP)

Wireless Bridging and Repeating

Point-to-Point Bridge Configuration