Show Me Microsoft Windows XP (2nd Edition)

If your computer is directly connected to the Internet using a nonshared or shared Internet connection, you should enable the Internet Connection Firewall (ICF) to protect your computer from unauthorized access from others on the Internet. A firewall is a security system that creates a protective barrier between your computer or network and others on the Internet, which prevents unsolicited Internet traffic from entering your private computer.

Enable an Internet Connection Firewall

Click the Start button, point to All Programs, point to Accessories, point to Communications, and then click Network Connections.

Right-click the Internet Connection icon, and then click Properties.

Click the Advanced tab.

Select the Protect My Computer And Network By Limiting Or Preventing Access To This Computer From The Internet check box.

Click OK.