User's Manual
Table Of Contents
- Reference Manual for the Model FWAG114 Cable/ DSL Wireless ProSafe Firewall
- Contents
- About This Manual
- Chapter 1 Introduction
- Chapter 2 Connecting the Firewall to the Internet
- Chapter 3 Wireless Configuration
- Chapter 4 Firewall Protection and Content Filtering
- Chapter 5 Maintenance
- Chapter 6 Advanced Configuration
- Chapter 7 Troubleshooting
- Appendix A Technical Specifications
- Appendix B Network, Routing, Firewall, and Basics
- Appendix C Preparing Your Network
- Appendix D Wireless Networking Basics
- Glossary
- Index
- About This Manual
- Chapter 1 Introduction
- Chapter 2 Connecting the Firewall to the Internet
- Chapter 3 Wireless Configuration
- Observe Performance, Placement, and Range Guidelines
- Implement Appropriate Wireless Security
- Understanding Wireless Settings
- Chapter 4 Firewall Protection and Content Filtering
- Firewall Protection and Content Filtering Overview
- Block Sites
- Using Rules to Block or Allow Specific Kinds of Traffic
- Services
- Using a Schedule to Block or Allow Specific Traffic
- Getting E-Mail Notifications of Event Logs and Alerts
- Viewing Logs of Web Access or Attempted Web Access
- Configuring E-Mail Alert and Web Access Log Notifications
- Chapter 5 Maintenance
- Chapter 6 Advanced Configuration
- Chapter 7 Troubleshooting
- Appendix A Technical Specifications
- Appendix B Network, Routing, Firewall, and Basics
- Appendix C Preparing Your Network
- Appendix D Wireless Networking Basics
- Glossary
- Index
Reference Manual for the Model FWAG114 Cable/DSL Wireless ProSafe Firewall
4-8 Firewall Protection and Content Filtering
Outbound Rules (Service Blocking)
The FWAG114 allows you to block the use of certain Internet services by PCs on your network.
This is called service blocking or port filtering. You can define an outbound rule to block Internet
access from a local PC based on:
• the IP address of the local PC (source address)
• the IP address of the Internet site being contacted (destination address)
• the time of day
• the type of service being requested (service port number)
Following is an application example of outbound rules:
Outbound Rule Example: Blocking Instant Messenger
If you want to block Instant Messenger usage by employees during working hours, you can create
an outbound rule to block that application from any internal IP address to any external address
according to the schedule that you have created in the Schedule menu. You can also have the router
log any attempt to use Instant Messenger during that blocked period.
Figure 4-5: Rule example: Blocking Instant Messenger