Top 5 Firewall

1) Sygate® Personal Firewall PRO
Before being discontinued by Symantec as a product, Sygate Personal Firewall software offered solid network protection, activity logging, and automatic email notifications. Free for personal use, it supported advanced configuration options without being overly difficult to use. The PRO edition (no longer available) includeed guaranteed VPN support, an unlimited number of security rules, ability to import/export settings to multiple computers, and one year of free upgrades.

2) ZoneAlarm™ Pro
Zone Labs provides a free ZoneAlarm download, too. The Pro edition adds email attachment protection similar to that offered by antivirus software, password protection, and ICS/NAT support. ZoneAlarm runs in Stealth Mode, making your PC literally "invisible" on the Internet. Though missing some of the more advanced personal firewall controls, its user interface includes handy features like the "Stop" button.

3) Symantec Norton Personal Firewall 2007
Some claim that Norton's graphic interface isn't as easy to use as some other products in this category. Symantec doesn't offer a free trial version of this personal firewall software product either. Still, it continues to improve, and a new Home Network Assistant feature simplifies administering security across the home LAN. The Norton Personal Firewall software is solid and from a reputable company.

4) Tiny Personal Firewall
A relative newcomer to the scene but now an established technology, the TINY Personal Firewall boasts low memory usage (small "footprint") on installed systems. It also contains an interesting time-based rule feature, where packet filters can be set to operate only at certain times of day. The U.S. Air Force chose this product as standard firewall software for its desktop computers. TINY Software provides a free personal version for home users.
Manufacturer's Site

5) McAfee Personal Firewall Plus
McAfee's software is sold on a one-year subscription basis rather than on one-time purchase, a feature that may appeal to some, but no free trial exists. McAfee also possesses a comparatively small footprint and a central "Control Panel" style of user interface. Product updates occur "live" over the Internet. McAfee does not support Windows ICS networks or the IIS Web server.

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