Free Personal Software Firewalls
Free firewall software to protect your computer from unwanted intrusions
Free Personal Firewall Software
Firewall software allow you to protect your computer from intrusions from the Internet as well as warn you when programs try to connect to Internet from your computer. It has become increasingly popular with numerous programs installing spyware that try to call home without your knowing. Some of these free firewalls are free only for personal use.
Note that commercial antivirus/antimalware "internet security" suites like Norton Internet Security, already include a firewall alongside its antivirus/antimalware capabilities. In addition, if you use a recent version of Windows (eg, Windows XP service pack 2 or 3, Windows Vista, Windows 7 and above), your system already has a basic firewall. In general, if you're a computer novice, and are not sure what to do after getting a firewall, you may be better off using one of the commercial suites or sticking with the default provided by Windows. A real firewall doesn't do what you think it does if your knowledge of it comes exclusively from Hollywood movies.
Free Software Firewalls
- Filseclab Personal Firewall Professional Edition
This Windows firewall filters inbound and outbound traffic. You can configure which applications on your system is allowed to access the Internet, although by default, it automatically allows certain applications (such as those from the company itself, or those signed by Microsoft) outbound access without question.
- SoftPerfect Personal Firewall
SoftPerfect Personal Firewall is a rule-based Windows network firewall that filters IP and non-IP traffic, supports configurations for multiple network adaptors, has a learning mode and comes with a set of predefined rules.
Guarddog is a firewall configuration utility for Linux iptables. It also lets you maintain and modify the firewall in place. It uses a "what is not explicitly allowed, is denied" philosophy. The software is released under the GNU GPL.
WIPFW is a packet filtering and accounting system for Windows. It is based on FreeBSD's IPFW.
- Firestarter - Free Linux Firewall Tool
Firestarter is an easy-to-use free firewall tool for Linux that has a wizard that allows you to customize your firewall, a real-time firewall monitor that allows you to view intrusion attempts, a graphical interface that works under GNOME and KDE, and support for Linux kernels 2.4 and 2.6. For those who aren't brave enough to muck around with netfilter / iptables, Firestarter is one way to set up your system so that it is protected from intrusions.
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