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Do I really need a firewall for my server?
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this post was submitted on 24 Mar 2025
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You don't. Providing you have an upstream gateway that do the firewall for you, provided you don't have an open WiFi, provided you use a reverse proxy, provided you have sane network settings all around, provided you run linux(or similar).
Even better if you are behind CGNAT.
Provided you know what you are doing.
On the other hand, setting up a firewall in a safe way is no easy task either.
I use an opnSense on top of my home network, given all the above "provided".
Before that, I never run a firewall and never had an issue. Always being cg-nat tough.