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For those who are serious about their network security, knowing which Linux firewall apps and solutions are available for free is crucial.

Setting up a firewall is key to securing your network perimeter. A firewall blocks sensitive ports and filters incoming and outgoing traffic to thwart malicious connections and ensure there is no unsolicited exchange of data.

In the world of FOSS, there are plenty of firewall solutions to choose from. Here's a list of the best firewall solutions for fortressing your network on Linux.