Could not delete non-existent rule.
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Full Error: Could not delete non-existent rule
What was being executed at the time?
$ sudo ufw delete deny 53 Could not delete non-existent rule Could not delete non-existent rule (v6)
Resolution:
The rule does not exist in ufw. If you added specific rules for port 53 i.e. 53/tcp, 53/udp. You need to specify the protocol too.First check the status.
$ sudo ufw status
If there is a rule there for port 53/tcp or 53/udp, you need to use this command.
$ sudo ufw delete deny 53/tcp
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