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Close a port in ufw by deleting its rule

caution rootFirewalldebian, ubuntu

Caution: This command changes the system. Understand what it does before you run it.

Adjust the values, the command updates live
root@server
ufw delete allow 8080/tcp

Deletes the rule exactly as it was created, for IPv4 and IPv6. The specification must match the original rule, with or without protocol, exactly as when it was created. If the default deny policy applies afterwards, the port is closed.

Note: Never delete the rule for the SSH port this way while you are connected through it and no other rule allows access.

Also searched as

  • ufw close port
  • ufw delete allow rule
  • remove open port ufw

Related one-liners

All in Firewall

Open a port with ufw

#ufw allow 443/tcp
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Allow a port only from a specific IP with ufw

#ufw allow from 198.51.100.0/24 to any port 22 proto tcp
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Block an IP address or subnet with ufw

#ufw insert 1 deny from 203.0.113.0/24
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Count IP addresses blocked by ufw

#journalctl -k --since "today" --no-pager | grep 'UFW BLOCK' | grep -o 'SRC=[^ ]*' | sort | uniq -c | sort -rn | head -20
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Delete a ufw rule by number

#ufw delete 3
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Enable ufw logging

#ufw logging low
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