Turn on Internet Connection Firewall in Win XP

Windows XP comes with Internet Connection Firewall, but you must turn it on to use it.

To turn on Internet Connection Firewall:

1.Point to Control Panel, double-click Network and Internet Connections, and then click Set up or change your home or small office network.
2.Follow the steps in the Network Setup Wizard to turn on the Internet Connection Firewall.

When you choose a configuration in the wizard that indicates that your computer is connected directly to the Internet, the Internet Connection Firewall is turned on.

Windows XP Service Pack 2 (SP2) and Windows Vista come with Windows Firewall automatically turned on