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 Verifying 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 Verifying 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

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Contents