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Is there a downside to sticking to iptables over ufw?
(sh.itjust.works)
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UFW is an interface to a subset of iptables.
There's things iptables can do that UFW can't. Nothing that UFW does, is impossible to do with iptables.
By why might one use UFW I hear you wonder? Convenience.
If you already master the art of iptables, no reason to learn UFW instead.