NETGEAR CG814W Reference Manual
SM-CG814WNA-0
January 2003
NETGEAR, Inc.
4500 Great America Parkway
Santa Clara, CA 95054 USA
Phone 1-888-NETGEAR
Reference Manual for the
Model CG814W Wireless
Cable Modem Gateway
ii
© 2002 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 CG814W 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).
iii
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das CG814W Wireless Cable Modem Gateway gemäß der im BMP T-AmtsblVfg 243/1991
und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B.
Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der
Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Certificate of the Manufacturer/Importer
It is hereby certified that the CG814W 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 Time Warner Cable "Wireless Road Runner" Service and 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 local Time Wa rner Cable office.
iv
Contents v
Contents
About This Manual
Chapter 1
Introduction..........................................................................................................................1-1
About the CG814W Gateway .........................................................................................1-1
Key Features ..................................................................................................................1-1
Built-in Cable Modem ...............................................................................................1-1
A Powerful, True Firewall .........................................................................................1-2
Content Filtering .......................................................................................................1-2
802.11b Standards-based Wireless Networking ......................................................1-2
Configurable Auto Uplink™ Ethernet Connection ....................................................1-3
USB Port ............................... .... ... ... ... .... ... ................................... ............................1-3
Protocol Support ......................................................................................................1-3
Easy Installation and Management ..........................................................................1-4
What’s in the Box? ..........................................................................................................1-5
The Gateway’s Front Panel ......................................................................................1-5
The Gateway’s Rear Panel ......................................................................................1-7
Chapter 2
Connecting the Gateway to the Internet............................................................................2-1
What You Will Need Before You Begin ............................ ................................... .... ... ... ..2-1
Hardware Requirements ..........................................................................................2-1
LAN Configuration Requirements ............................................................................2-1
Internet Configuration Requirements .......................................................................2-2
Where Do I Get the Internet Configuration Parameters? ......................................... 2-2
Record Your Internet Connection Information ..........................................................2-3
Connecting the CG814W Gateway ................................................................................2-4
Chapter 3
Wireless Configuration............................ ... ... .... ... ... ... ... .... ... ... ... .... ................................... ..3-1
Considerations For A Wireless Network .........................................................................3-1
Implement Appropriate Security ................................... .................................... ........ 3-1
vi Contents
Observe Placement and Range Guidelines .............................................................3-2
Configuring Wireless Settings ........................................................................................3-3
Wireless Network Settings .............................. ... .................................... ... ... .... ... ... ..3-3
Restricting Wireless Access by MAC Address .........................................................3-4
Configuring Wired Equivalent Privacy (WEP) ....................................................3-6
Chapter 4
Protecting Your Network.....................................................................................................4-1
Protecting Access to Your CG814W Gateway ................................................................4-1
Blocking Keywords, Sites, and Services ................................................... ... ... ... .... ... ... ..4-2
Using Port Blocking ........................................................................................................4-4
Port Forwarding ............................................... ... ... ... .... ... ... ... .... ... ..................................4-6
Using Port Triggering ......................................................................................................4-8
Setting Up A Default DMZ Host ....................................................................................4-10
Respond to Ping on Internet WAN Port .................................................................4-10
Chapter 5
Managing Your Network................................................................. ... ... ... .... ... ... ..................5-1
Network Status Information ............................................................................................5-1
Viewing Gateway Status ..........................................................................................5-1
Connection Status ........................... ... .... ... ... ... ... .... ................................... ... .... ... .....5-3
Current System Time .......... ... ... ... .... ... ... ............................................................5-3
Configuring LAN IP Settings ...........................................................................................5-4
LAN IP Setup ..................................................................................................................5-4
Using the Gateway as a DHCP Server ....................................................................5-5
DHCP Client Lease Info ....................................................................................5-6
Viewing and Emailing Logged Information .....................................................................5-7
Enabling Logs Event E-mail Notification ..................................................................5-7
Erasing Configuration .....................................................................................................5-8
Running Diagnostic Utilities ............................................................................................5-8
Chapter 6
Troubleshooting................................................. .................................................................. 6-1
Basic Functions ..............................................................................................................6-1
Power LED Not On ...................................................................................................6-2
Test LED Stays On ................................................. ... ... ... .................................... ... ..6-2
Local Link LEDs Not On ...........................................................................................6-2
Cable Link LED Not On ............................................................................................6-3
Contents vii
Troubleshooting the Web Configuration Interface ..........................................................6-3
Troubleshooting the ISP Connection ..............................................................................6-4
Troubleshooting a TCP/IP Network Using a Ping Utility .................................................6-4
Testing the LAN Path to Your Gateway ....................................................................6-4
Testing the Path from Your PC to a Remote Device ................................................6-5
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-2
Routing Information Protocol ................................................................................... B-2
IP Addresses and the Internet ...................................... ... .... ................................... . B-2
Netmask ................................................................. ................................................. B-4
Subnet Addressing .................................................................................................. B-5
Private IP Addresses .............................. ................................... ... .... ... .................... B-7
Single IP Address Operation Using NAT ................................................................. B-8
MAC Addresses and Address Resolution Protocol ................................................. B-9
Related Documents ................................................................................................. B-9
Domain Name Server ............................................................................................ B-10
IP Configuration by DHCP ............................................................... ... ... ... ... .... ... .. B-10
Internet Security and Firewalls .................................................................................... B-10
What is a Firewall? .................................................................................................B-11
Stateful Packet Inspection ............................ ... ... .................................... ... ... .... ... ...B-11
Denial of Service Attack .........................................................................................B-11
Wireless Networking Overview ..................... ... ... ... ... .... ... ... ... .... ... ............................... B-12
Infrastructure Mode ............................................................................................... B-12
Ad Hoc Mode (Peer-to-Peer Workgroup) ........................ .... .................................. B-12
Network Name: Extended Service Set Identification (ESSID) .............................. B-13
Authentication and WEP ........................ ... .... ... ... ... ... .... ... ... ... .... ... ............................... B-13
802.11b Authentication .......................................................................................... B-13
Open System Authentication ................................................................................. B-14
Shared Key Authentication .................................................................................... B-15
Overview of WEP Parameters .............................................................................. B-16
viii Contents
Key Size ................................................................................................................ B-16
WEP Configuration Options ............................... .... ................................... ... .... ... .. B-17
Wireless Channels .................... ... .... ... ... ... .... ............................................................... B-18
Ethernet Cabling ....................... ... .................................... ... ... .... ... ... ... .... ..................... B-20
Uplink Switches and Crossover Cables ................................................................ B-20
Cable Quality ......................................................................................................... B-21
Appendix C
Preparing Your Network ..................................................................................................... C-1
Preparing Your Computers for TCP/IP Networking ......................................... ... .... ... ... . C-1
Configuring Windows 95, 98, and Me for TCP/IP Networking ....................................... C-2
Install or Verify Windows Networking Components ...................... ....................... ....C-2
Enabling DHCP in Windows 95B, 98, and Me ........................................................C-4
Selecting Windows’ Internet Access Method .......................................................... C-6
Verifying TCP/IP Properties .................................................................................... C-6
Configuring Windows NT4, 2000 or XP for IP Networking ............................................ C-7
Install or Verify Windows Networking Components ...................... ....................... ....C-7
DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4 ...............................C-8
DHCP Configuration of TCP/IP in Windows XP .....................................................C-8
DHCP Configuration of TCP/IP in Windows 2000 ................................................ C-11
DHCP Configuration of TCP/IP in Windows NT4 .................................................. C-14
Verifying TCP/IP Properties for Windows XP, 2000, and NT4 .. ... .... ... ... ... ... .... ... .. C-16
Configuring the Macintosh for TCP/IP Networking ...................................................... C-17
MacOS 8.6 or 9.x ............................ ... .... ... ... ... ... .... ... ... .................................... ... .. C-17
MacOS X .. .... ... ... ... ... .... ... ... .................................... ... ... ... .................................... .. C-18
Verifying TCP/IP Properties for Macintosh Computers ......................................... C-18
Verifying the Readiness of Your Internet Account ....................................................... C-19
Are Login Protocols Used? ................................................................................... C-19
What Is Your Configuration Information? ..............................................................C-19
Obtaining ISP Configuration Information for Windows Computers .......................C-20
Obtaining ISP Configuration Information for Macintosh Computers .....................C-21
Restarting the Network ................................................................................................ C-22
Glossary..............................................................................................................................G-1
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
About This Manual ix
About This Manual
Thank your for purchasing the NETGEAR™ CG814W Wireless Cable Modem Gateway.
This manual describes the features of the gateway and provides installation and configuration
instructions.
Audience
This reference manual assumes that the reader has basic to intermediate computer and Internet
skills. However, basic computer network, Internet, firewall, and PC networking technologies
tutorial information is provided in the Appendices.
Typographical Conventions
This guide uses the following typographical conventions:
italics Media titles, UNIX files, commands, URLs, and directory names.
bold times roman User input
Internet Protocol (IP) First time an abbreviated term is used.
courier font Screen text, user-typed command-line entries.
[Enter] Named keys in text are shown enclosed in square brackets. The notation
[Enter] is used for the Enter key and the Return key.
[Ctrl]+C Two or more keys that must be pressed simultaneously are shown in text
linked with a plus (+) sign.
ALL CAPS DOS file and directory names.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
x About This Manual
Special Message Formats
This guide uses the following formats to highlight special messages:
Technical Support
For help with any technical issues, contact Customer Support at 1-888-NETGEAR, or visit us on
the Web at www.NETGEAR.com. The NETGEAR Web site includes an extensive knowledge
base, answers to frequently asked questions, and a means for submitting technical questions
online.
Note: This format is used to highlight information of importance or special interest.
Warning: This format is used to highlight information about the possibility of injury or
equipment damage.
Danger: This format is used to alert you that there is the potential for incurring an
electrical shock if you mishandle the equipment.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Introduction 1-1
Chapter 1
Introduction
This chapter describes the features of the NETGEAR CG814W Wireless Cable Modem Gateway.
About the CG814W Gateway
The NETGEAR CG814W Wireless Cable Modem Gateway co nn ects 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 CG814W 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 CG814W Gateway uses Stateful Packet Inspection for Denial of Service (DoS)
attack protection and intrusion detection. The CG814W Gateway provides highly reliable Internet
access for up to 253 users.
Key Features
The CG814W Gateway offers the following features.
Built-in Cable Modem
The CG814W Gateway connects directly the WAN using an integrated cable modem. The modem
is DOCSIS 1.0 compliant and upgradable to DOCSIS 1.1, guaranteeing that it will work with your
local cable service provider.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
1-2 Introduction
A Powerful, True Firewall
Unlike simple Internet sharing NAT routers, the CG814W Gateway is a true firewall, using stateful
packet inspection to defend against hacker attacks. Its firewall features include:
• Denial of Service (DoS) protection
Automatically detects and thwarts Denial of Service (DoS) attacks such as Ping of Death,
SYN Flood, LAND Attack and IP Spoofing.
• 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 CG814W Gateway 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 CG814W Gateway prevents objectionable content from
reaching your PCs. The gateway allows you to control access to Internet content by screening for
keywords within Web addresses. You can configure the gateway to log and report attempts to
access objectionable Internet sites.
802.11b Standards-based Wireless Networking
The CG814W Gateway includes an 802.11b-compliant wireless access point, providing
continuous, high-speed 11 Mbps access between your wireless and Ethernet devices. The access
point provides:
• 802.11b Standards-based wireless networking at up to 11 Mbps
• 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.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Introduction 1-3
Configurable Auto Uplink™ Ethernet Connection
With its internal 4-port 10/100 switch, the CG814W Gateway can connect to either a 10 Mbps
standard Ethernet network or a 100 Mbps Fast Ethernet network. Both the local LAN and the
Internet WAN interfaces are autosensing and capable of full-duplex or half-duplex operation.
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 CG814W Gateway 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 CG814W Gateway 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 CG814W Gateway 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.
• DNS Relay
When DHCP is enabled and no DNS addresses are specified, the gateway provides its own
address as a DNS server to the attached PCs. The gateway obtains actual DNS addresses from
the ISP during connection setup and forwards DNS requests from the LAN.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
1-4 Introduction
Easy Installation and Management
You can install, configure, and operate the CG814W Gateway 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.
• 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 CG814W Gateway 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.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Introduction 1-5
What’s in the Box?
The product package should contain the following items:
• CG814W 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 CG814W Gateway (Figure 1-1) contains status LEDs.
Figure 1-1: CG814W Gateway Front Panel
You can use some of the LEDs to verify connections. Table 1-1 lists and describes each LED on
the front panel of the CG814W Gateway. These LEDs are green when lit.
Table 1-1. LED Descriptions
Label Activity Description
Power On
Off
Power is supplied to the gateway.
Power is not supplied to the gateway.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
1-6 Introduction
The Gateway’s Rear Panel
The rear panel of the CG814W Gateway (Figure 1-2) contains the connections identified below.
Figure 1-2: CG814W Gateway Rear Panel
Viewed from left to right, the rear panel contains the following elements:
Test On
Off
A system failure has occurred. Reboot the gateway.
Normal operation.
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.
Cable
Traffic
On
Off
Data is being transmitted or received on 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.
USB On (Green)
Blink (Green)
Off
The Local port has detected link with a USB device.
Data is being transmitted or received through USB.
No link is detected on the USB port.
Table 1-1. LED Descriptions
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Introduction 1-7
• AC power adapter input
• 802.11b Wireless antenna
• Factory Default Reset push button
• USB port for connecting the gateway to a local computer
• Four Ethernet RJ-45 ports for connecting the gateway to local computers
• Coaxial F-type connector for connecting the gateway to your cable service provider
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
1-8 Introduction
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Connecting the Gateway to the Internet 2-1
Chapter 2
Connecting the Gateway to the Internet
This chapter describes how to set up the CG814W 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 CG814W Gateway connects to your LAN using either its twisted-pair Ethernet, USB or
802.11b wireless port.
To use the CG814W Gateway on your network, each computer must have either an installed
Ethernet Network Interface Card (NIC), USB Host port or 802.11b wireless adapter. If the
computer will connect to your network at 100 Mbps, you must use a Category 5 (CA T5) 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.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
2-2 Connecting the Gateway to the Internet
Note: Please refer to Appendix C, "Preparing Your Network" for assistance with DHCP
configuration.
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
• MAC Address of the PC you used to first connect to the cable modem service
Where Do I Get the Internet Configuration Parameters?
If you already have cable Internet service and are replacing a cable modem, you may need these
parameters.
• CG814W Gateway Cable and Device MAC Address, that can b e found on the bottom of your
gateway, or on the Basic Settings page.
• The MAC Address of the PC that you use to access the internet.
There are several ways you can gather the required Internet connection information.
• Your ISP should have provided you with all the information needed to connect to the Internet.
If you cannot locate this information, you can ask your ISP to provide it or you can try one of
the options below.
• If you have a computer already connected using the active Internet access account, you can
gather the configuration information from that computer.
• For Windows 95/98/ME, open the Network control panel, select the TCP/IP entry for the
Ethernet adapter, and click Properties.
• For Windows 2000/XP, open the Local Area Network Connection, select the TCP/IP entry
for the Ethernet adapter, and click Properties.
• For Macintosh computers, open the TCP/IP or Network control panel.
Once you locate your Internet configuration parameters, you may want to record them on the page
below.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Connecting the Gateway to the Internet 2-3
Record Your Internet Connection Information
Print this page. Fill in the configuration parameters from your Internet Service Provider (ISP).
Host and Domain Names: Some ISPs use a specific host or domain name like CCA7324-A or
attbi. If you haven’t been given host or domain names, use the following examples as a guide:
• If your main e-mail account with your ISP is aaa@yyy.com, then use aaa as your host name.
Your ISP might call this your account, user, host, computer, or system name.
• If your ISP’s mail server is mail.xxx.yyy.com, then use xxx.yyy.com as the domain name.
ISP Host Name: _________________________ ISP Domain Name: _______________________
Fixed or Static IP Address: If you have a static IP address, record the following information. For
example, 169.254.141.148 could be a valid IP address.
Fixed or Static Internet IP Address: ______ . ______ . ______ . ______
Subnet Mask: ______ . ______ . ______ . ______
Gateway IP Address: ______ . ______ . ______ . ______
ISP DNS Server Addresses: If you were given DNS server addresses, fill in the following:
Primary DNS Server IP Address: ______ . ______ . ______ . ______
Secondary DNS Server IP Address: ______ . ______ . ______ . ______
MAC Addresses of CG814W Gateway and PC: If you have existing cable internet service and are
replacing your cable modem you may need to notify your cable service provider of the MAC
Address (often called Hardware Address) and/or Device Address of your CG814W Gateway. The
Device Address is the equivalent of a PC behind the cable modem, and can be “cloned”. Cloning
allows you to specify the MAC address of the packets the gateway sends to the internet. If you
clone the MAC Address of your PC you will not have to register the Device Address of your
gateway.
Cable Modem MAC (listed on the bottom of your gateway): ______________________________
Device MAC (listed on the bottom of your gateway): ____________________________________
PC MAC Address (listed on the Basic Settings page): ___________________________________
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
2-4 Connecting the Gateway to the Internet
Connecting the CG814W 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 CG814W Gateway.
1. Connect the Gateway.
a. Turn off your computer.
b. Using the coaxial cable provided by your cable company, connect the CG814W Gateway
cable port (A) to your cable line splitter or outlet.
Figure 2-1: Connect the gateway to the cable network.
c. Conn ect 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.
Note: Set up the CG814W 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.
A
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Connecting the Gateway to the Internet 2-5
Connect the gateway to you computer using the Ethernet cable included in the box from
your CG814W Gateway’s LAN port (B) to the Ethernet adapter in your computer.
Figure 2-2: Connect a PC to the gateway
The CG814W 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.
d. T o connect your computer to the modem via USB involves installing the USB driver.Insert
the CD which 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.
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.
B
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
2-6 Connecting the Gateway to the Internet
– The found new hardware Windows installation wizard will prompt you for the drivers.
Figure 2-3: Found New Hardware Wizard window
Browse to the CD and install the USB driver by clicking through the Windows wizard
prompts.
e. Plug in your CG814W Gateway and wait about 30 seconds for the lights to stop blinking.
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.
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 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 Internet Explorer or
Netscape
®
Navigator.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Connecting the Gateway to the Internet 2-7
A login window opens as shown in Figure 2-4 below:
Figure 2-4: Login window
b. For security reasons, the gateway has its own user name an d password. When prompted,
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 2-5 below.
Note: If you were unable to connect to the gateway, please refer to “Basic Functions” on
page 6-1.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
2-8 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 2-5: Basic Settings page
You are ready to configure your gateway to connect to the Internet.
Unless your ISP assigns your configuration automatically via DHCP, you will need the
ISP configuration parameters you recorded in “Record Your Internet Connection
Information” on page 2-3.
b. Your current WAN IP address information is shown on this page.
If you have set your configuration for Dynamic IP, below, then an IP address information
shown here is an indication that you have successfully received an IP address from your
service provider.
If you have set your configuration to Static IP, below, then the IP address information you
entered will be shown here.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Connecting the Gateway to the Internet 2-9
For Dynamic IP, the Duration and time of Expiration of the IP address are shown. The IP
address is renewed automatically using DHCP.
c. Enter your Host Name and Domain Name.
These parameters may be necessary to access your ISP’s services such as mail or news
servers.
If your ISP does not provide a Host and Domain name, you can use the following
example: If your main e-mail account with your ISP is
aaa@yyy.com, then use aaa as
your host name and
yyy.com as the domain name.
d. 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.
e. The CG814W Gateway Cable MAC address is for the built-in cable modem. The
CG814W Gateway Device MAC address is for the built-in router. MAC cloning lets you
substitute a different MAC address for the CG814W Gateway’s built-in router address.
Note: Some cable Internet companies will require you to notify them when you replace
the original cable modem or PC so that they can register the MAC address of one or both
of these devices.
• MAC cloning lets you substitute a different MAC address for the CG814W Gateway’s
built-in router address.
The first time you log in to the CG814W Gateway, it automatically fills in the Cloned
MAC Address with the MAC address from the PC which is logged in to the CG814W
Gateway.
• Click Apply to accept these settings.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
2-10 Connecting the Gateway to the Internet
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Wireless Configuration 3-1
Chapter 3
Wireless Configuration
This chapter describes how to configure the wireless features of your CG814W 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 on Apply. You must then change the wireless settings of your PC to match the
gateway’s new settings.
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
3-2 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
.
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