Best firewall for Linux
A firewall is a line of defense on your network, primarily used to filter incoming traffic, but also used for outbound rules and other network related security. All major Linux distros come with a software firewall built into them, since it is part of the Linux kernel itself. Any user can configure their system firewall to get started with securing network traffic, but there are many alternatives to the default which will extend or simplify the functionality.
In this tutorial, we have compiled a list of our top picks for the best firewalls available on Linux. The one you pick will largely depend on your goals for securing your network. Of course, corporations or large networks will need a very different firewall solution than a typical end user. You will see a few choices below to help steer you in the right direction to pick a firewall that best suits your needs.
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The best solution largely depends on your own preference and what kind of security your network or individual computer needs.