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Using the Windows firewall

Windows XP has included a firewall specifically, Internet Connection Firewall (IFC) software since the product was first shipped. Although the firewall has not been turned on by default, it has always been there. The original firewall was a basic one-way firewall that would block incoming traffic from the Web. One feature allowed users to open up ports so that they could still use remote applications. This way, a user could protect all of the ports on the computer
except one or two that they had set to remain open so that they could use a program such as remote desktop to connect to their computer from a different location.

The new version of the firewall included as part of Service Pack 2 has a bunch of new features that makes use of a firewall even easier while the protection it provides your computer remains the same.
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