Personal Software Firewalls

The firewalls included with Macintosh and Microsoft Windows provide protection only for inbound traffic. If your computer has been infected, it can still be used by malware on your computer to launch malware attacks against other computers.

For complete protection, you’ll need to use a firewall other than what’s included with your operating system so that you can filter outbound traffic. Many antimalware software packages also include a software firewall. If it includes a firewall with outgoing traffic monitoring, all you need to do is enable it. If it doesn’t, you can install a standalone third-party firewall that includes this feature. There are several free and pay options.

Here are some of the best available for Windows computers.




comodo
Comodo Firewall
Comodo offers a free personal firewall for Windows. They also offer other excellent security products, such as Comodo Internet Security (which includes the firewall), Comodo Antivirus for Mac, and Comodo Mobile Security for Android.


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agnitum
Agnitum Outpost Firewall Pro
Outpost Firewall Pro has been around for 15 years. It consistently posts the highest industry ratings for inbound and outbound traffic protection as well as data leak prevention.


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zone_alarmZone Alarm Pro Firewall
The Zone Alarm Pro Firewall is the most advanced personal firewall on the market. They also are the creators of the Zone Alarm Free Firewall, which is the most downloaded firewall in the world, and offer a full range of excellent security software.


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For Macintosh computers, there are several options, such as WaterRoof and NoobProof.

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