NETGEAR CG814WH User manual

NETGEAR CG814WH Wireless Cable Modem Gateway
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NETGEAR CG814WH
Wireless Cable Modem Gateway
User Guide
COPYRIGHT & TRADEMARKS
Copyright 2002 NETGEAR, All Rights Reserved. Microsoft,
Windows, and the Windows logo are registered trademarks
of Microsoft Corporation. All other trademarks and brand
names are the property of their respective proprietors.
FCC STATEMENT
The NETGEAR CG814WH has been tested and complies
with the specifications for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interface in a
residential installation. This equipment generates, uses, and
can radio frequency energy and, if not installed and used
according to 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 is found by turning the equipment
off and on, the user is encouraged to try to correct the
interference by one or more of the following measure:
•Reorient or relocate the receiving antenna
•Increase the separation between the equipment of devices
•Connect the equipment to an outlet other than the receiver
•Consult a dealer or an experienced radio/TV technician for
assistance

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Chapter 1: Introduction
Overview
Thank you for purchasing the NETGEAR CG814WH Wireless Cable Modem
Gateway. The NETGEAR CG814WH provides the ideal solution for
connecting your wireless network to a high-speed broadband Internet
connection and a 10/100 Fast Ethernet backbone. Configurable as a DHCP
server for your existing network, the NETGEAR CG814WH acts as the only
externally recognized Internet gateway on your local area network (LAN) and
serve as an Internet NAT firewall against unwanted outside intruders. The
NETGEAR CG814WH can also be configured to filter internal users’access to
the Internet.
A typical gateway relies on a hub or a switch to share its Internet connection,
but the NETGEAR CG814WH channels this connection through the blazing,
full duplex of its built-in 10/100 4-Port Switch. This cutting-edge combination of
wireless router and switch technology eliminates the need to buy an additional
hub or switch and extends the range of your wireless network. Now your entire
wireless network can enjoy blazing broadband Internet connections supported
by its robust switched backbone. With the dual-function speed and power of
the NETGEAR CG814WH, your network will take off at speeds faster than you
ever imagined possible.
Software Features
DOCSIS Features
lCable Modem (CM) is 1.0 and 1.1 upgradeable
lConcatenation, Fragmentation, Payload Header suppression, IGMP
and BPI and BPI Plus are supported features for DOCSIS 1.1
l4/16/32/64/128/256/512/1024 QAM Downstream Receiver
l2/4/8/16/32/64/128/256 QAM Advanced TDMA Upstream Transmitter
lBoth IP and LLC filters are supported
lSixteen (16) destination address filters and 256 multicast/unicast DA
filters
lSixteen (16) independent upstream queues for multiple QoS support
USB Features
lOS (Win2K, XP, WinME) supported for USB interface

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Wireless Features
lSupports at least one beacon/DTIM interval of within the range
20-1000κμs
lSupports reception of fragmented packets
lSupports reception of RTS and generation of CTS
Firewall Features
lStateful Packet Inspection against both Denial of Service and
Distributed Denial of Service attacks and will protect against the
following:
ØReassembly attacks
ØSYN Attack (SYN Flood)
ØICMP Flood
ØPing of Death Attack
ØTear Drop Attack
ØIP Spoofing Attack
ØLAND Attack
ØJolt
ØWinnuke Attack (Netbios out-of-bound)
ØOverDrop
ØBONK, BOINK
ØBlind Spoofing
ØEcho/Chargen
ØStorm
ØSmurf Attack
ØMime Flood
lDe-Militarized Zone (DMZ) which allows a computer on the LAN to
expose all of its ports to the WAN that are not otherwise filtered
lLogged Events which all security incidents will be logged
lKeyword blocking is based on keywords in a URL and can be
specified by the user
NAT Requirements
The implementation of NAT must allow for specific port redirection. Listed
below are applications supported.

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ØFTP
ØIRC
ØH.323
ØQuake
ØBlizzard games
ØChat ALG
ØReal Audio/Video
ØCUSEEME
ØNetmeeting
ØMS Games but not with game zone
ØDIABOLO II
ØActivision Games
ØPCAnywhere
ØSSL
ØNNTP
lPort Forwarding, incoming traffic that is not part of an existing
connection will be dropped unless the user specifies forwarding of the
server to a host on the LAN
Virtual Private Network (VPN) Feature
lHaving the ability to enable or disable PPTP and IPSec pass through
Minimum Requirements
„One RJ-45 Broadband Internet connection, with a Cable Modem
„One PC with an installed 10Mbps, 100Mbps, or 10/100 Mbps Ethernet
card (optional)
„TCP/IP network protocol for each PC
„UTP network cable with RJ-45 connector
„Microsoft Internet Explorer 4.0 or later, or Netscape Navigator 4.0 or later.
(5.0 and 4.7, respectively, are strongly recommended.)
„Windows 95, 98, Millennium, NT 4.0, 2000 or XP
Package Contents
R{1} Cable Modem
R{1} AC Power adapter
R{1} CAT.5 Ethernet cable {RJ-45}

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Chapter2:UsingtheNETGEARCG814WH
All interface and status LEDs are provided on the front panel. The power
connectors, signal connectors, and Restore Factory Defaults/Reboot button
are on the rear panel.
The Restore factory settings Button
Briefly pressing the Reset Button will clear all of the Gateway’s data and
restore the factory defaults. This should be done only if you are experiencing
heavy routing problems, and only after you have exhausted all of the other
troubleshooting options. By resetting the Gateway, you run the risk of creating
conflicts between your PCs’ actual IP Addresses and what the Gateway thinks
their IP Addresses should be. You may be forced to reboot the entire
system(s).
If your Gateway locks up, simply power it down for 5 seconds by removing the
power cable from the Gateway’s Power Port. Leaving the power off for too
long could result in the loss of network connections.

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Chapter3:ConnecttheGateway
Overview
Unlike a simple hub or switch, the Gateway’s setup consists of more than
simply plugging hardware together. You will have to configure your networked
PCs to accept the IP addresses that the Gateway assigns them (if applicable),
and you will also have to configure the Gateway with setting(s) provided by
your Internet Service Provider (ISP).
The installation technician from your ISP should have left the setup
information with you after installing your broadband connection. If not, you can
call your ISP to request the data.
Once you have the setup information you need for your specific type of
Internet connection, you can begin installation and setup of the Gateway.
Connecting Your Hardware Together and Booting Up
1. Before you begin, make sure that all of you hardware is powered off,
including the Gateway, PCs, hubs, and switches.
2. Connect one end of an Ethernet cable to one of the LAN ports (labeled 1, 2,
3, or 4) on the back of the Gateway and the other end to a standard port on
a network device, e.g., a PC, print server, hub, or switch. Repeat the above
step to connect more PCs or network devices to the Gateway.
3. Connect the cable from your ISP to the Cable port on the Gateway’s back
panel.
4. Connect the power-supply cable to the Power port on the rear of the
Gateway, then plug the supplied AC power cable into a power outlet and
power on the NETGEAR CG814WH.
•The Power LED on the front panel will light up green as soon as the
power adapter is connected properly.
•The Diag LED will light up red for a few seconds when the Gateway

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goes through its self-diagnostic test. The LED will turn off when the
self-test is complete.
5. Power on the network devices that connected to the NETGEAR
CG814WH.
The Hardware Installation is complete. Continue to the next page to
configure your PCs with NETGEAR CG814WH.

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Chapter4:ConfigureYourPCs
Overview
The instructions in this chapter will help you configure each of your computer
to be able to communicate with the Gateway.
To do this, you need to configure your PC’s network settings to obtain an IP (or
TCP/IP) address automatically (called DHCP). Computers use IP addresses to
communicate with each other across a network or the Internet.
Find out which operating system your computer is running, such as Windows
95, 98, Millennium, NT 4.0, 2000, or XP. You will need to know which operating
system your computer is running. You can find out by clicking the Start button
and then going to the Settings option. Then click Control Panel, and then
double-click the System icon. If your Start menu doesn’t have a Settings
option, you’re running Windows XP. Click the Cancel button when done.
You may need to do this for each computer you are connecting to the
Gateway.
Important: These instructions apply only to Windows 95, 98, Millennium, 2000,
or XP machines. For TCP/IP setup under Windows NT, see your Windows
manual. By default Windows 98, 2000, Me, and XP has TCP/IP installed and
set to obtain an IP address automatically.
The next few pages tell you, step by step, how to configure your network
settings based on the type of Windows operating system you are using. Make
sure that an Ethernet card or adapter has been successfully installed in each
PC you will configure.
Configuring Windows 98, ME and XP PCs
1. Go to the Network screen by click the Start button. Click Settings and then
Control Panel. From there, double-click the Network icon.
2. On the Configuration tab, select the TCP/IP line for the applicable Ethernet

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adapter. Do not choose a TCP/IP entry whose name mentions DUN,
PPPoE, VPN, or AOL. If the work TCP/IP appears by itself, select that line.
(If there is no TCP/IP line listed, refer to“Appendix C: Installing the TCP/IP
Protocol.) Click the Properties button.
3. Click the IP Address tab. Select Obtain an IP address automatically.