NETGEAR CG814WG V2 Reference Manual
NETGEAR, Inc.
4500 Great America Parkway
Santa Clara, CA 95054 USA
Phone 1-888-NETGEAR
202-10074-01
January 2005
Reference Manual for the
Wireless Cable Modem
Gateway CG814WG v2
ii
© 2005 by NETGEAR, Inc. All rights reserved.
Trademarks
NETGEAR is a trademark 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.
Federal Communications Commission (FCC) Compliance Notice: Radio Frequency
Notice
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the inst ructi ons, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this e quipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
EN 55 022 Declaration of Conformance
This is to certify that the CG814WG v2 Wireless Cable Modem Gateway is shielded against the generation of radio
interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by
the application of EN 55 022 Class B (CISPR 22).
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das CG814WG v2 Wireless Cable Modem Gateway gemäß der im BMPT-AmtsblVfg 243/
1991 und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B.
Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der
Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
iii
Certificate of the Manufacturer/Importer
It is hereby certified that the CG814WG v2 Wireless Cable Modem Gateway 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.
Technical Support
Thank you for choosing Netgear product(s). Please register online and take advantage of the technical support resources
such as Netgear online knowledge base. Technical support is available twenty-four hours a day, seven days a week;
please call your Cable Internet Service Provider.
Product and Publication Details
Model Number: CG814WG v2
Publication Date: January 2005
Product Family: firewall
Product Name: CG814WG v2 Wireless Cable Modem Gateway
Home or Business Product: Insert value by editing user variable Target Market
Language: English
iv
Contents i
Contents
Chapter 1
About This Manual...............................................................................................................1-1
Audience, Conventions, Publication Date ......................................................................1-1
Chapter 2
Introduction..........................................................................................................................2-1
About the CG814WG v2 .................................................................................................2-1
Key Features ..................................................................................................................2-1
Built-in Cable Modem ...............................................................................................2-1
A Powerful, True Firewall .........................................................................................2-1
Content Filtering .......................................................................................................2-2
802.11b and 802.11g Standards-based Wireless Networking ..................................2-2
Configurable Auto Uplink™ Ethernet Connection ....................................................2-2
USB Port ............................... .... ... ... ... .... ... ................................... ............................2-3
Protocol Support ......................................................................................................2-3
Easy Installation and Management ..........................................................................2-3
What’s in the Box? ..........................................................................................................2-4
The Gateway’s Front Panel ......................................................................................2-4
The Gateway’s Rear Panel ......................................................................................2-6
Chapter 3
Connecting the Gateway to the Internet............................................................................3-1
What You Will Need Before You Begin ............................ ... ... .... ................................... ..3-1
Hardware Requirements ..........................................................................................3-1
LAN Configuration Requirements ............................................................................3-1
Internet Configuration Requirements .......................................................................3-2
Connecting the CG814WG v2 Gateway .........................................................................3-2
Chapter 4
Wireless Configuration............................ ... ... .... ... ... ... ... .... ... ... ... .... ................................... ..4-1
Considerations For A Wireless Network .........................................................................4-1
Implement Appropriate Security ................................... .................................... ........ 4-1
ii Contents
Observe Placement and Range Guidelines .............................................................4-2
Configuring Wireless Settings ........................................................................................4-3
Wireless Network Settings .............................. ... .................................... ... ... .... ... ... ..4-4
Wireless Access Point ............................... ... ... ... .... ................................... ... .... ... ... ..4-4
Restricting Wireless Access by MAC Address .........................................................4-4
Configuring Wired Equivalent Privacy (WEP) ..........................................................4-6
Chapter 5
Protecting Your Network.....................................................................................................5-1
Protecting Access to Your CG814WG v2 Gateway ........................................................5-1
Blocking Keywords, Sites, and Services ...................................................... ... ... .... ... ... ..5-2
Blocking Keywords and Domains .............................................................................5-3
Using MAC Filtering ........................................................................................................5-4
Blocking Access by Time of Day ..............................................................................5-6
Using Port Blocking ........................................................................................................5-6
Port Forwarding ............................................... ... ... ... .... ... ... ... .... ... ..................................5-7
Using Port Triggering ......................................................................................................5-9
Setting Up A Default DMZ Host ....................................................................................5-10
Respond to Ping on Internet WAN Port .................................................................5-11
Enabling or Disabling Content Filtering Services ......................................................... 5-11
Chapter 6
Managing Your Network................................................................. ... ... ... .... ... ... ..................6-1
Network Status Information ............................................................................................6-1
Viewing Gateway Status ..........................................................................................6-1
Connection Status ........................... ... .... ... ... ... ... .... ................................... ... .... ... .....6-3
Configuring LAN IP Settings ...........................................................................................6-4
LAN IP Setup ..................................................................................................................6-4
Using the Gateway as a DHCP Server ....................................................................6-5
Viewing and Emailing Logged Information .....................................................................6-6
Enabling Logs Event E-mail Notification ..................................................................6-6
Erasing Configuration .....................................................................................................6-7
Running Diagnostic Utilities ............................................................................................6-8
Enabling Remote Management Access .........................................................................6-9
Enabling Remote Management Access After a Reset ...................................................6-9
Contents iii
Chapter 7
Troubleshooting................................................. .................................................................. 7-1
Basic Functions ..............................................................................................................7-1
Power LED Not On ...................................................................................................7-2
All LEDs Stay On ......................................................................................................7-2
Local Link LEDs Not On ...........................................................................................7-2
Cable Link LED Not On ............................................................................................7-2
Troubleshooting the Web Configuration Interface ..........................................................7-3
Troubleshooting the ISP Connection ..............................................................................7-4
Troubleshooting a TCP/IP Network Using a Ping Utility .................................................7-4
Testing the LAN Path to Your Gateway ....................................................................7-4
Testing the Path from Your PC to a Remote Device ................................................7-5
Appendix A
Technical Specifications .................................................................................................... A-1
Appendix B
Networks, Routing, and Firewall Basics........................................................................... B-1
Related Publications ...................................................................................................... B-1
Basic Router Concepts .................................................................................................. B-1
What is a Router? ................................................................................................... B-1
Routing Information Protocol ................................................................................... B-2
IP Addresses and the Internet ...................................... ... .... ................................... . B-2
Netmask ................................................................. ................................................. B-4
Subnet Addressing .................................................................................................. B-4
Private IP Addresses .............................. ................................... ... .... ... .................... B-7
Single IP Address Operation Using NAT ................................................................. B-7
MAC Addresses and Address Resolution Protocol ................................................. B-8
Related Documents ................................................................................................. B-9
Domain Name Server .............................................................................................. B-9
IP Configuration by DHCP ............................................................... ... ... ... ... .... ... .. B-10
Internet Security and Firewalls .................................................................................... B-10
What is a Firewall? ................................................................................................ B-10
Stateful Packet Inspection ............................ ... ... .................................... ... ... .... ... ...B-11
Denial of Service Attack .........................................................................................B-11
Wireless Networking Overview ..................... ... ... ... ... .... ... ... ... .... ... ................................B-11
Infrastructure Mode ................................................................................................B-11
iv Contents
Ad Hoc Mode (Peer-to-Peer Workgroup) ........................ .... .................................. B-12
Network Name: Extended Service Set Identification (ESSID) .............................. B-12
Authentication and WEP ........................ ... .... ... ... ... ... .... ... ... ... .... ... ............................... B-13
802.11b Authentication .......................................................................................... B-13
Open System Authentication ................................................................................. B-14
Shared Key Authentication .................................................................................... B-14
Overview of WEP Parameters .............................................................................. B-15
Key Size ................................................................................................................ B-16
WEP Configuration Options ............................... .... ................................... ... .... ... .. B-16
Wireless Channels .................... ... .... ... ... ... .... ............................................................... B-17
Ethernet Cabling ....................... ... .................................... ... ... .... ... ... ... .... ..................... B-18
Uplink Switches and Crossover Cables ................................................................ B-19
Cable Quality ......................................................................................................... B-19
Appendix C
Preparing Your Network to Work with a Router ............................................................... C-1
What You Need To Use a Router with a Broadband Modem .........................................C-1
Cabling and Computer Hardware ............................................................................C-1
Computer Network Configuration Requirements .................................................... C-1
Internet Configuration Requirements ...................................................................... C-2
Where Do I Get the Internet Configuration Parameters? ........................................ C-2
Record Your Internet Connection Information .........................................................C-3
Preparing Your Computers for TCP/IP Networking ......................................... ... .... ... ... . C-4
Configuring Windows 95, 98, and Me for TCP/IP Networking ....................................... C-5
Installing or Ve rifying Windows Networking Components ......................... ....... ... ... . C-5
Enabling DHCP to Automatically Configure TCP/IP Settings in
Windows 95B, 98, and Me .................................................................. ... ... ... .... ... ... . C-6
Selecting the Windows’ Internet Access Method .................................................... C-8
Verifying TCP/IP Properties .................................................................................... C-8
Configuring Windows NT4, 2000 or XP for IP Networking ............................................ C-9
Installing or Ve rifying Windows Networking Components ......................... ....... ... ... . C-9
Configuring DHCP of TCP/IP in Windows XP, 2000, or NT4 ................................C-10
DHCP Configuration of TCP/IP in Windows XP ...................................................C-10
DHCP Configuration of TCP/IP in Windows 2000 ................................................ C-12
DHCP Configuration of TCP/IP in Windows NT4 .................................................. C-14
Verifying TCP/IP Properties for Windows XP, 2000, and NT4 .. ... .... ... ... ... ... .... ... .. C-15
Configuring the Macintosh for TCP/IP Networking ...................................................... C-16
Contents v
MacOS 8.6 or 9.x ............................ ... .... ... ... ... ... .... ... ... .................................... ... .. C-16
MacOS X .. .... ... ... ... ... .... ... ... .................................... ... ... ... .................................... .. C-16
Verifying TCP/IP Properties for Macintosh Computers ......................................... C-17
Verifying the Readiness of Your Internet Account ....................................................... C-17
Are Login Protocols Used? ................................................................................... C-18
What Is Your Configuration Information? ..............................................................C-18
Obtaining ISP Configuration Information for Windows Computers .......................C-19
Obtaining ISP Configuration Information for Macintosh Computers .....................C-20
Restarting the Network ................................................................................................ C-20
Appendix D
Wireless Networking Basics............................. ... ... ... ... .... ... ... ... .... ... ... ... .... ... .................... D-1
Wireless Networking Overview ..................... ... ... ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... . D-1
Infrastructure Mode .................................................................................................D-1
Ad Hoc Mode (Peer-to-Peer Workgroup) ..................... ... .... ... ... ... .... ... ... ... ... .... ... ....D-2
Network Name: Extended Service Set Identification (ESSID) ................................D-2
Wireless Channels ................................................................. ... ... .... ... ... ... ..............D-2
WEP Wireless Security ............. ... .... ... ... ... .... ... ... ... ... .... ... ................................... .... ... ... . D-4
WEP Authentication ........................ ... .... ... ... ... ... .... ................................... ... .... ... ....D-4
WEP Open System Authentication ......................................................................... D-5
WEP Shared Key Authentication ............................................................................ D-6
How to Use WEP Parameters ................................................................................. D-8
WPA Wireless Security .................................................................................................. D-8
How Does WPA Compare to WEP? ........................................................................ D-9
How Does WPA Compare to IEEE 802.11i? ........................................................ D-10
What are the Key Features of WPA Security? ...................................................... D-10
Is WPA Perfect? ........................................................ ... ... .... ... ... ... .... ... ..................D-16
Product Support for WPA ...................................................................................... D-16
Glossary..............................................................................................................................G-1
vi Contents
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
About This Manual 1-1
Chapter 1
About This Manual
Congratulations on your purchase of the CG814WG v2 Wireless Cable Modem Gateway. The
CG814WG v2 provides connection for multiple personal computers to the Internet. It connects
directly to your cable line using an embedded DOCSIS 2.0 cable modem.
Audience, Conventions, Publication Date
This reference manual assumes that the reader has basic-to-intermediate computer and Internet
skills. However, basic computer network, Internet, firewall, and networking technology tutorial
information is provided in the Appendices.
This guide uses the following typographical conventions:
This guide uses the following formats to highlight special messages:
This manual is written f according to these specifications.:
Table 1- 1. Typographical conventions
italics Emphasis, books, CDs, URL names
bold time User input
courier font Screen text, file and server names, extensions, commands, IP addresses
Note: This format is used to highlight information of importance or special interest.
Table 1-2. Firmware Version and Manual Publication Date
Firmware Version 2.95r09
Manual Publication Date January 2005
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
1-2 About This Manual
How to Print this Manual
To print this manual you can choose one of the following several options, according to your needs.
• Printing a Chapter. Use the link at the top right of any page.
– Click “PDF of This Chapter” link at the top right of any page in the chapter you want to
print. A new browser window opens showing the PDF version of the chapter you were
viewing.
– Click the print icon in the upper left of the window.
– Tip: If your printer supports printing two pages on a single sheet of paper, you can save
paper and printer ink by selecting this feature.
• Printing the Full Manual. Use the PDF button in the toolbar at the top right of the browser
window.
– Click PDF button. A new browser window opens showing the PDF versio n of the chapter
you were viewing.
– Click the print icon in the upper left of the window.
– Tip: If your printer supports printing two pages on a single sheet of paper, you can save
paper and printer ink by selecting this feature.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Introduction 2-1
Chapter 2
Introduction
This chapter describes the features of the NETGEAR CG814WG v2 Wireless Cable Modem
Gateway.
About the CG814WG v2
The NETGEAR CG814WG v2 Wireless Cable Modem Gateway connects directly to the wide area
network (WAN) using its built-in cable modem. It has multiple options to connect to your local
area network (LAN), including a 4-port 10/100 Mbps Ethernet switch, a USB port and an 802.11b
wireless Access Point.
The CG814WG v2 Gateway is a complete security solution that protects your network from
attacks and intrusions. Unlike simple Internet sharing routers that rely on Network Address
Translation (NAT) for security, the CG814WG v2 uses Stateful Packet Inspection for Denial of
Service (DoS) attack protection and intrusion detection. The CG814WG v2 provides highly
reliable Internet access for up to 253 users.
Key Features
The CG814WG v2 offers the following features.
Built-in Cable Modem
The CG814WG v2 Gateway connects directly the WAN using an integrated cable modem. The
modem is DOCSIS 2.0, guaranteeing that it will work with your local cable service provider.
A Powerful, True Firewall
Unlike simple Internet sharing NAT routers, the CG814WG v2 is a true firewall, using stateful
packet inspection to defend against hacker attacks. Its firewall features include:
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
2-2 Introduction
• Denial of Service (DoS) protection
Automatically detects and thwarts Denial of Service (DoS) attacks such as Ping of Death,
SYN Flood, LAND Attack and IP Spoofing.
• Configurable Port Forwarding, Port Blocking, Port Triggering and DMZ provide enough
flexibility for most applications.
• Blocks access from your LAN to Internet locations or services that you specify as off-limits.
• Logs security incidents
The CG814WG v2 will log security events such as blocked incoming traffic, port scans,
attacks, and administrator logins. You can configure the gateway to email the log to you
whenever a significant event occurs.
Content Filtering
With its content filtering feature, the CG814WG v2 prevents objectionable content from reaching
your PCs. The gateway allows you to control access to Internet content by screening for keywords
within Web addresses.
Dual login allows an adult to configure content filtering, while still allowing a child to configure
other features of the gateway.
802.11b and 802.11g Standards-based Wireless Networking
The CG814WG v2 Gateway includes an 802.11g- and 802.11b-compliant wireless access point,
providing continuous, high-speed 54 Mbps access between your wireless and Ethernet devices.
The access point provides:
• 802.11g Standards-based wireless networking at up to 54Mbps
• 64-bit and 128-bit WEP encryption security
• WEP keys can be generated manually or by passphrase
• Wireless access can be restricted by MAC address.
Configurable Auto Uplink™ Ethernet Connection
With its internal 4-port 10/100 switch, the CG814WG v2 can connect to either a 10 Mbps standard
Ethernet network or a 100 Mbps Fast Ethernet network. Both the local LAN and the Internet W AN
interfaces are autosensing and capable of full-duplex or half-duplex operation.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Introduction 2-3
The gateway incorporates Auto UplinkTM technology. Each LOCAL Ethernet port will
automatically sense whether the Ethernet cable plugged into the port should have a ‘normal’
connection such as to a PC or an ‘uplink’ connection such as to a switch or hub. That port will then
configure itself to the correct configuration. This feature also eliminates the need to worry about
crossover cables, as Auto Uplink will accommodate either type of cable to make the right
connection.
USB Port
A USB connection for your computer eliminates the need for installing an Ethernet card.
Protocol Support
The CG814WG v2 supports the Transmission Control Protocol/Internet Protocol (TCP/IP).
Appendix B, "Networks, Routing, and Firewall Basics" provides further information on TCP/IP.
• IP Address Sharing by NAT
The CG814WG v2 allows several networked PCs to share an Internet account using only a
single IP address, which may be statically or dynamically assigned by your Internet service
provider (ISP). This technique, known as Network Address Translation (NAT), allows the use
of an inexpensive single-user ISP account.
• Automatic Configuration of Attached PCs by DHCP
The CG814WG v2 dynamically assigns network configuration information, including
IP, gateway, and domain name server (DNS) addresses, to attached PCs on the LAN using the
Dynamic Host Configuration Protocol (DHCP). This feature greatly simplifies configuration
of PCs on your local network.
Easy Installation and Management
You can install, configure, and operate the CG814WG v2 within minutes after connecting it to the
network. The following features simplify installation and management tasks:
• Browser-based management
Browser-based configuration allows you to easily configure your gateway from almost any
type of personal computer, such as Windows, Macintosh, or Linux. A user-friendly Setup
Wizard is provided and online help documentation is built into the browser-based Web
Management Interface.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
2-4 Introduction
• Diagnostic functions
The gateway incorporates built-in diagnostic functions such as Ping, DNS lookup, and remote
reboot. These functions allow you to test Internet connectivity and reboot the gateway. You
can use these diagnostic functions directly from the CG814WG v2 when your are connect on
the LAN or when you are connected over the Internet via the remote management function.
• Visual monitoring
The gateway’s front panel LEDs provide an easy way to monitor its status and activity.
What’s in the Box?
The product package should contain the following items:
• CG814WG v2 Wireless Cable Modem Gateway
•AC power adapter
• Category 5 (CAT5) Ethernet cable
• USB cable
• Resource CD, including:
— This manual
— Application Notes, Tools, and other helpful information
If any of the parts are incorrect, missing, or damaged, contact your NETGEAR dealer. Keep the
carton, including the original packing materials, in case you need to return the product for repair.
The Gateway’s Front Panel
The front panel of the CG814WG v2 (Figure 2-1) contains status LEDs.
Figure 2-1: CG814WG v2 Front Panel
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Introduction 2-5
You can use some of the LEDs to verify connections. Table 2-1 lists and describes each LED on
the front panel of the CG814WG v2 Gateway. These LEDs are green when lit.
Table 2-1. LED Descriptions
Label Activity Description
Power On
Off
Power is supplied to the gateway.
Power is not supplied to the gateway.
Cable Link On (Green)
Off
Configuration of the cable interface by your cable service provider
is complete.
Configuration of the cable interface is still in progress.
Upload
Traffic
Blink
Off
Data is being transmitted to the cable interface.
The cable interface is idle.
Download
Traffic
Blink
Off
Data is being received from the cable interface.
The cable interface is idle.
Wireless On
Blink
Indicates that the wireless Access Point is operating normally.
Data is being transmitted or received on the wireless interface.
Local
(Local Area
Network)
On (Green)
Blink (Green)
On (Yellow)
Blink (Yellow)
Off
The Local port has detected link with a 100 Mbps device.
Data is being transmitted or received at 100 Mbps.
The Local port has detected link with a 10 Mbps device.
Data is being transmitted or received at 10 Mbps.
No link is detected on this port.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
2-6 Introduction
The Gateway’s Rear Panel
The rear panel of the CG814WG v2 (Figure 2-2) contains the connections identified below.
Figure 2-2: CG814WG v2 Rear Panel
AC power adapter input
wireless antenna
reset button
USB port
4 Ethernet LAN ports to connect local computers
coaxial cable to your cable service provider
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Connecting the Gateway to the Internet 3-1
Chapter 3
Connecting the Gateway to the Internet
This chapter describes how to set up the CG814WG v2 Gateway on your Local Area Network
(LAN), connect to the Internet and perform basic configuration.
What You Will Need Before You Begin
You need to prepare these three things before you can connect your gateway to the Internet:
1. A computer properly connected to the gateway as explained below.
2. Active Data Over Cable Internet service provided by cable modem account.
3. The Internet Service Provider (ISP) configuration information for your cable modem account.
Hardware Requirements
The CG814WG v2 Gateway connects to your LAN using either its twisted-pair Ethernet, USB or
802.11b or 802.11g wireless port.
To use the CG814WG v2 Gateway on your network, each computer must have either an installed
Ethernet Network Interface Card (NIC), USB Host port or 802.11b or 802.11g wireless adapter. If
the computer will connect to your network at 100 Mbps, you must use a Category 5 (CAT5) cable
such as the one provided with your gateway.
LAN Configuration Requirements
For the initial connection to the Internet and configuration of your gateway, you will need to
connect a computer to the gateway which is set to automatically get its TCP/IP configuration from
the gateway via DHCP.
Note: Please refer to Appendix C, “Preparing Y our Network” for assistance with DHCP
configuration.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
3-2 Connecting the Gateway to the Internet
Internet Configuration Requirements
Depending on how your ISP set up your Internet account, you will need one or more of these
configuration parameters to connect your gateway to the Internet:
• Host and Domain Names
• ISP Domain Name Server (DNS) Addresses
• Fixed or Static IP Address
Connecting the CG814WG v2 Gateway
Before using your gateway, you need to do the followin g:
• Connect to your computer, using either Ethernet, USB or wireless.
• Connect the line from your cable service provider to the cable connector of the gateway.
• Connect the power adapter.
Your computer will attach to either the Ethernet, USB or wireless ports on the CG814WG v2
Gateway.
1. Connect the Gateway.
a. Turn off your computer.
b. Using the coaxial cable provided by your cable company, connect the CG814WG v2 cable
port (A) to your cable line splitter or outlet.
Figure 3-1: Connect the gateway to the cable network.
A
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Connecting the Gateway to the Internet 3-3
c. Connect the gateway to you computer.
— If you will connect with the Ethernet cable, follow the instructions below.
— If you will connect with the USB cable, skip to step d below.
Connect the gateway to you computer using the Ethernet cable included in the box from
your CG814WG v2’s LAN port (B) to the Ethernet adapter in your computer.
Figure 3-2: Connect a PC to the gateway
The CG814WG v2 Gateway incorporates Auto UplinkTM technology. Each LOCAL
Ethernet port will automatically sense whether the cable plugged into the port should have
a “normal” connection (e.g., connecting to a PC) or an “uplink” connection (e.g.,
connecting to a switch or hub). That port will then configure itself to the correct
configuration. This feature also eliminates the need to worry about crossover cables, as
Auto Uplink will accommodate either type of cable to make the right connection.
Note: Set up the CG814WG v2 Gateway using either an Ethernet or USB connection to
your computer first, then configure the wireless settings. Detailed instructions on
configuring your wireless devices for TCP/IP networking are provided in the next
chapter.
B
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
3-4 Connecting the Gateway to the Internet
d. To connect your computer to the modem via USB you must install the USB driver. Insert
the Resource CD that came with your gateway into the CD drive of your computer.
Install the USB driver.
– Connect the USB cable to your modem and plug in the AC power for the gateway.
– Use the USB cable to connect your computer to the gateway.
– The found new hardware Windows installation wizard will prompt you for the drivers.
Figure 3-3: Found New Hardware Wizard window
Browse to the Resource CD and install the USB driver by clicking through the Windows
wizard prompts.
e. Plug in your CG814WG v2 and wait about 30 seconds for the lights to stop b linking.
f. Now, turn on your computer. If software usually logs you in to your Internet connection,
do not run that software or cancel it if it starts automatically.
g. Verify the following:
The power light is lit after turning on the gateway.
The cable link light is solid green, indicating a link has been established to the cable
network.
The local lights are lit for any connected computers.
Note: The USB connection option is only available for Windows PCs. Also, Windows
95 does not support USB without special operating system upgrades and patches.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Connecting the Gateway to the Internet 3-5
2. Log in to the Gateway.
Note: To connect to the gateway, your computer needs to be configured to obtain an IP
address automatically via DHCP. For instructions on how to do this, please see Appendix C,
“Preparing Your Network”.
a. Using the computer that you first used to access your cable modem Internet service,
connect to the gateway by typing http://192.168.0.1 in the address field of your Internet
browser.
A login window opens as shown below:
Figure 3-4: Login window
b. For security reasons, the gateway has two sets of user names and passwords: one for a
parent and one for children. Only the parent’s login can be used to set up Parental Control
and MAC Filtering. The child’s login can configure all other features of the gateway.
When prompted to log in as the parent, enter superuser for the user name and password
for the password, both in lower case letters.
When prompted to log in as the child, enter admin for the user name and password for the
password, both in lower case letters.
c. After logging in, you will see the Basic Settings shown in Figure 3-5 below.
Note: If you were unable to connect to the gateway, please refer to “Basic Functions” on
page 7-1.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
3-6 Connecting the Gateway to the Internet
3. Connect to the Internet.
a. You are now connected to the gateway. Click the Basic Settings link on the upper left of
the main menu. You are now connected to the gateway’s Basic Settings page, shown
below.
Figure 3-5: Basic Settings page
You are ready to configure your gateway to connect to the Internet.
b. Select Dynamic or Static IP Address:
If your service provider assigns your IP address automatically through DHCP, select
“Dynamic IP”. If your service provider has assigned you a permane nt, fixed (static) IP
address for your PC, select “Static IP”.
If you select Static IP, enter the IP address that your ISP assigned. Also enter the Static IP
Mask (also known as netmask), Gateway IP address and Domain Name Server (DNS)
Address.
– The Gateway is the ISP’s router to which your gateway will connect.
– A DNS server is a host on the Internet that translates Internet names (such as
www.netgear.com) to numeric IP addresses. Typically your ISP transfers the IP
address of one or two DNS servers to your gateway during login. If the ISP does not
transfer an address, you must obtain it from the ISP and enter it manually here. If you
enter an address here, you should reboot your PCs after configuring the gateway.
c. Click Apply to accept these settings.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Wireless Configuration 4-1
Chapter 4
Wireless Configuration
This chapter describes how to configure the wireless features of your CG814WG v2 Wireless
Cable Modem Gateway.
Considerations For A Wireless Network
In planning your wireless network, you should consider the level of security required. You should
also select the physical placement of your gateway in order to maximize the network speed. For
further information on wireless networking, refer to “Wireless Networking Overview” in
Appendix B, “Networks, Routing, and Firewall Basics”.”
Implement Appropriate Security
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. Restricting access by MAC address filtering adds an obstacle to
unwanted users joining your network. To hinder a determined eavesdropper , you should use one o f
Wired Equivalent Privacy (WEP) data encryption options.
Note: If you are configuring the gateway from a wireless PC and you change the
gateway’ s SSID, channel, or WEP settings, you will lose your wireless connecti on when
you click Apply. You must then change the wireless settings of your PC to match the
gateway’s new settings.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
4-2 Wireless Configuration
Observe Placement and Range Guidelines
The operating distance or range of your wireless connection can vary significantly based on the
physical placement of the wireless gateway.
For best results, place your gateway:
• Near the center of the area in which your PCs will operate.
• In an elevated location such as a high shelf.
• Away from potential sources of interference, such as PCs, microwaves, and 2.4 GHz cordless
phones.
• Away from large metal surfaces.
Note: Failure to follow these guidelines can result in significant performance
degradation or inability to wirelessly connect to the router
.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Wireless Configuration 4-3
Configuring Wireless Settings
To configure the Wireless interface of your gateway, click on the Wireless Settings heading in the
Setup section of the browser interface. The Wireless Settings menu will appear, as shown below:
Figure 4-1: Wireless Settings menu
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
4-4 Wireless Configuration
Wireless Network Settings
In the Wireless Settings section are the following parameters:
• Name (SSID)
Enter a Service Set ID (SSID) value of up to 32 alphanumeric characters. The same SSID must
be assigned to all wireless devices in your network. The default SSID is Wireless, but
NETGEAR strongly recommends that you change your network’s SSID to a different value.
• Channel
This field determines which operating frequency will be used. It should not be necessary to
change the wireless channel unless you notice interference problems with another nearby
access point.
Wireless Access Point
In the Wireless Access Point Settings section are the following parameters:
• Enable Wireless Access Point
Use this checkbox to turn on or turn off the wireless network. The default is to enable the
wireless network.
• Allow Broadcast of Name (SSID)
Use this checkbox to turn on or turn off broadcast of the wireless network Name (SSID). The
default is to broadcast the wireless network Name (SSID). If you uncheck this item, only
wireless devices with the correct SSID will be connect. Turning off the SSID broadcast
prevents some wireless devices from discovering and reporting the SSID of your wireless
network.
Restricting Wireless Access by MAC Address
By default, any wireless PC that is configured with the correct SSID will be allowed access to your
wireless network. For increased security, you can restrict access to the wireless network to only
allow specific PCs based on their MAC addresses.
Check the Turn Access Control On box to restrict access to you network to computers in the
Access Control List.
To access the Access List, click the Setup Access List button.
Note: If the Turn Access Control On is enabled and the Access Control List is blank;
then all wireless PCs will be unable to connect to your wireless network.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
Wireless Configuration 4-5
:
Figure 4-2: Wireless Access List menu
The Access List displays a list of MAC addresses that will be allowed to connect to the gateway.
These PCs must also have the correct SSID and WEP settings. You can add MAC addresses to the
Access List by either selecting form the list of Connected Wireless Devices, or by manual entering
MAC addresses
To restrict access based on MAC addresses:
1. For your convenience, this menu displays a list of currently Connected Wireless Devices and
their MAC addresses. Select a device from the list that you want to allow to access your
network.
2. If the desired PC does not appear in the list, you can manually enter the MAC address of the
authorized PC.
The MAC address is usually printed on the wireless card.
3. If no Device Name appears, you can type a descriptive name for the PC that you are adding.
Reference Manual for the Wireless Cable Modem Gateway CG814WG v2
4-6 Wireless Configuration
4. Click Add.
5. When you have finished entering MAC addresses, click Apply to save the Access List and
return to the Wireless Settings menu.
To delete a MAC address from the table, click on it to select it, then click the Delete button.
Configuring Wired Equivalent Privacy (WEP)
In the Wireless Settings menu you can configure WEP data encryption using the following
parameters:
• Encryption Mode
Select the WEP Encryption level:
• Off - no data encryption (Open System)
• 64-bit (sometimes called 40-bit) encryption
• 128-bit encryption
• Authentication Type
Select the appropriate value - "Open System" or "Shared Key." Check your wireless card's
documentation to see what method to use.
• Encryption (WEP) Key
If WEP is enabled, you can manually or automatically program the four data encryption keys.
These values must be identical on all PCs and Access Points in your network.
• Automatic - Enter a word or group of printable characters in the WEP PassPhrase box and
click the Generate button. The four key boxes will be automatically populated with key
values.
• Manual - Enter ten hexadecimal digits (any combination of 0-9, a-f, or A-F)
Select which of the four keys will be active.
Be sure to click Apply to save your settings in this menu.
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