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Context: Docker bypasses all UFW firewall rules
(lemmy.world)
Docker docs:
Docker routes container traffic in the nat table, which means that packets are diverted before it reaches the INPUT and OUTPUT chains that ufw uses. Packets are routed before the firewall rules can be applied, effectively ignoring your firewall configuration.
Well, I guess that's a good reason. Node version management seems to handle most of that for me though. I haven't worked on an OS without support for it.