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Chapter 12. Network Configuration > Configuring TCP/IP Filtering
Recipe 12.11. Configuring TCP/IP Filtering
Problem
You want to configure TCP/IP filtering either to prevent a system from responding to certain protocols or ports, or to allow it to respond only to certain protocols or ports. This filtering is applied to inbound traffic and does not affect outbound traffic.
Solution
Using a graphical user interface
Open the Control Panel.
From the Network Connections applet, open the connection you want to configure.
Click the Properties button.
Select Internet Protocol (TCP/IP).
Click the Properties button.
Click the Advanced button.
Click the Options tab.
Select TCP/IP filtering.
Click the Properties button.
Check the box beside Enable TCP/IP Filtering.
Select Permit Only for TCP Ports, UDP Ports, and/or IP Protocols.
Click the Add button.
Enter the port or protocol number and click OK.
Repeat the last three steps until you've entered all desired ports and protocols.
After you are done, close all the dialog screens by clicking either OK or Close.
You will be prompted to reboot for the changes to take effect.
