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Do you need to have a firewall on a linux desktop?
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this post was submitted on 06 Oct 2023
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Yes, because you can forget what services are running and maybe they can be explited.
An example can be Syncthing which setting are done via web browser at port 8384. If you do not have a firewall, everyone on the same network would be able to change Syncthing settings and then sync your directories to their devices.
Is syncthing listening on all addresses, or only loopback? A firewall would block it, sure, but that would also be bad design.
Syncthing only listens on loopback by default unless you modify the config.