Firewall free softwares

AppArmor Security suite for Linux, freeware, open-source. AppArmor is also very useful for preventing scripts and programs running on Webservers from being hacked and exploited.
AS3 Personal Firewall Free firewall for Windows (32bit).


Ashampoo Offers a free firewall for Windows.


Comodo Free firewall + anti-virus for Windows.


Core Force Open-source firewall, packet-sniffer and security framework for Windows.


Firestarter Freeware open-source firewall for Linux with graphical user-interface.


FortKnox Personal Firewall Free firewall for Windows.


GhostWall Free firewall for Windows (both 32bit and 64bit).


Home PC Firewall Guide Independent reviews of Internet security and privacy-related products.


MoBlock Freeware for Linux. A linux console application that blocks connections from/to hosts listed in a file.


Netdefender Freeware open-source firewall for Windows.


Omniquad Personal
Firewall Freeware Free firewall for Windows. Although the site looks like it has been abandoned you can still download the firewall.


Outpost Firewall Free Free firewall for Windows.


PC Tools Firewall Plus A free personal firewall for Windows.


PeerGardian OS X Freeware open-source firewall for MAC OS X.


PeerGuardian for Windows Small yet powerful firewall. Freeware, open-source for Windows 98, ME, 2000, XP, and 2003, in 32-bit and 64-bit.


R-Firewall Freeware firewall for Windows, with many features.


SoftPerfect Free personal firewall for Windows.


Sunbelt Personal Firewall Free firewall for Windows. The version offered for download is the full 30-day trial version as well as the feature-limited free version.


Vista Firewall Control A freeware application which makes the configuration of the built-in firewall of Windows Vista and Windows 7 easier.


Zone Alarm
Free Firewall Free basic PC desktop firewall for Windows.

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