This document is a WORK IN PROGRESS.
This is just a quick personal cheat sheet: treat its contents with caution!
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network.
Table of contents¶
A lot of firewalls are available. Here are maybe some of the most popular:
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