User's Manual
Table Of Contents
- Reference Manual for the Model CG814W Wireless Cable Modem Gateway
- Contents
- About This Manual
- Chapter 1 Introduction 1-1
- Chapter 2 Connecting the Gateway to the Internet 2-1
- Chapter 3 Wireless Configuration 3-1
- Chapter 4 Protecting Your Network 4-1
- Chapter 5 Managing Your Network 5-1
- Chapter 6 Troubleshooting 6-1
- Appendix A Technical Specifications A-1
- Appendix B Networks, Routing, and Firewall Basics B-1
- Appendix C Preparing Your Network C-1
- Glossary G-1
- About This Manual
- Chapter 1 Introduction
- Chapter 2 Connecting the Gateway to the Internet
- Chapter 3 Wireless Configuration
- Chapter 4 Protecting Your Network
- Chapter 5 Managing Your Network
- Chapter 6 Troubleshooting
- Appendix A Technical Specifications
- Appendix B Networks, Routing, and Firewall Basics
- Related Publications
- Basic Router Concepts
- Internet Security and Firewalls
- Wireless Networking Overview
- Authentication and WEP
- Wireless Channels
- Ethernet Cabling
- Appendix C Preparing Your Network
- Glossary
Reference Manual for the Model CG814W Wireless Cable Modem Gateway
Protecting Your Network 4-5
A firewall has two default rules, one for inbound traffic and one for outbound. The default rules of
the CG814W Gateway are:
• Inbound: Block all access from outside except responses to requests from the LAN side.
• Outbound: Allow all access from the LAN side to the outside.
You may define additional rules that will specify exceptions to the default rules. By adding custom
rules, you can block or allow access based on the service or application, source or destination IP
addresses, and time of day.
To configure outbound rules on the CG814W Gateway, click the Port Blocking link on the
Advanced section of the main menu.
Figure 4-4: Port Blocking menu
• To block outbound traffic, select the service you would like to block from the drop-down
list of predefined services. Click Add.