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vi
Contents
Connecting the CG814M Gateway
.................................................................................
2-5
Connecting to Your Computer
..................................................................................
2-5
Ethernet
.............................................................................................................
2-6
USB
...................................................................................................................
2-6
Wireless
.............................................................................................................
2-7
Connecting to your Cable Service Provider
.............................................................
2-7
Connecting the Power Adapter
................................................................................
2-8
Log in to the Gateway
.....................................................................................................
2-8
Connecting the CG814M Gateway to the Internet
........................................................
2-11
Configuration
..........................................................................................................
2-11
Chapter 3
Wireless Configuration
........................................................................................................
3-1
Considerations For A Wireless Network
.........................................................................
3-1
Security
....................................................................................................................
3-1
Placement and Range
..............................................................................................
3-2
Wireless Settings
............................................................................................................
3-2
Wireless Settings
.....................................................................................................
3-3
Restricting Wireless Access by MAC Address
.........................................................
3-3
Configuring Wired Equivalent Privacy (WEP)
..........................................................
3-4
Chapter 4
Protecting Your Network
.....................................................................................................
4-1
Protecting Access to Your CG814M Gateway
................................................................
4-1
Changing the Built-In Password
...............................................................................
4-1
Blocking Keywords, Sites, and Services
........................................................................
4-2
Block Keywords and Domains
.................................................................................
4-3
Blocking Services
.....................................................................................................
4-5
Port Blocking
..................................................................................................................
4-6
Port Forwarding
..............................................................................................................
4-7
Considerations for Port Forwarding
...................................................................
4-9
Port Triggering
................................................................................................................
4-9
Setting Up A Default DMZ Host
....................................................................................
4-11
Respond to Ping on Internet WAN Port
........................................................................
4-11
Chapter 5
Managing Your Network
......................................................................................................
5-1
Network Status Information
............................................................................................
5-1
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vii
Viewing Gateway Status
..........................................................................................
5-2
Connection Status
....................................................................................................
5-4
Current System Time
.........................................................................................
5-5
Configuring LAN IP Settings
...........................................................................................
5-5
LAN IP Setup
...........................................................................................................
5-5
DHCP
.......................................................................................................................
5-6
Use router as DHCP server
...............................................................................
5-6
Viewing and Emailing Logged Information
.....................................................................
5-7
Enabling Logs Event E-mail Notification
..................................................................
5-8
Erasing Configuration
.....................................................................................................
5-8
Running Diagnostic Utilities
............................................................................................
5-9
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
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
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Contents
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
....................................................................................................
B-12
Wireless Network Configuration
............................................................................
B-12
Ad-hoc Mode (Peer-to-Peer Workgroup)
........................................................
B-12
Infrastructure Mode
........................................................................................
B-12
Extended Service Set Identification (ESSID)
........................................................
B-13
Authentication and WEP Encryption
.....................................................................
B-13
Wireless Channel Selection
..................................................................................
B-14
Ethernet Cabling
..........................................................................................................
B-15
Uplink Switches and Crossover Cables
................................................................
B-15
Cable Quality
.........................................................................................................
B-16
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 to Automatically Configure TCP/IP Settings
...........................
C-4
Selecting Windows’ Internet Access Method
....................................................
C-4
Verifying TCP/IP Properties
..............................................................................
C-5
Configuring Windows NT, 2000 or XP for IP Networking
........................................
C-5
Install or Verify Windows Networking Components
..........................................
C-5
Verifying TCP/IP Properties
..............................................................................
C-6
Configuring the Macintosh for TCP/IP Networking
..................................................
C-6
MacOS 8.6 or 9.x
..............................................................................................
C-6
MacOS X
..........................................................................................................
C-7
Verifying TCP/IP Properties for Macintosh Computers
.....................................
C-8
Verifying the Readiness of Your Internet Account
.........................................................
C-9
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ix
What Is Your Configuration Information?
................................................................
C-9
Obtaining ISP Configuration Information for Windows Computers
.................
C-10
Obtaining ISP Configuration Information for Macintosh Computers
...............
C-11
Restarting the Network
................................................................................................
C-12
Glossary
..............................................................................................................................
G-1
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