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this post was submitted on 03 Aug 2023
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Linux
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From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I suppose you could say it's similar in that there are allow-lists and deny-lists that permit or restrict actions, but the key difference is Apparmor/SELinux are in the OS space - they can permit/restrict the ability to restart services, or prevent sudo from being used in certain ways.
Firewalls are predominantly used to permit/restrict network connectivity either ingress (e.g. traffic from outside the system coming into it) or egress (e.g. traffic that is leaving the system). A good example would be using a firewall to restrict ingress traffic to port 22 - allowing remote management of a system over SSH.
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