How to Enable and Configure Personal Firewalls

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A personal firewall on your computer protects your computer from unwanted network access through open network ports. Computers can be "hacked" by different types of software applications (e.g. worms), through brute force attempts, and by individual hackers. Every computer has a personal firewall included with the operating system. The personal firewall can filter or block IP traffic (upd, tcp, and icmp) inbound to your computer and outbound from your computer.

Below you will find documentation for enabling and configuring a personal firewall on individual operating systems.

Directions for Windows Operating Systems
Windows XP
Windows Vista
Windows 7
Directions for OS-X Operating Systems
OS-X 10.4
OS-X 10.5
OS-X 10.6