Reference Manual for the Wireless Cable Modem Gateway CG814WG v2

About This Manual

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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

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About This Manual

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Reference Manual for the Wireless Cable Modem Gateway CG814WG v2

Introduction

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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

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Introduction

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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.

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Configurable Port Forwarding, Port Blocking, Port Triggering and DMZ provide enough

flexibility for most applications.

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

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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:

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802.11g Standards-based wireless networking at up to 54Mbps

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64-bit and 128-bit WEP encryption security

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WEP keys can be generated manually or by passphrase

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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 WAN

interfaces are autosensing and capable of full-duplex or half-duplex operation.

Reference Manual for the Wireless Cable Modem Gateway CG814WG v2

Introduction

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The gateway incorporates Auto Uplink

TM

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.

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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.

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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:

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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.