#ufw

10 one-liners with this tag.

Allow a port only from a specific IP with ufw

#ufw allow from 198.51.100.0/24 to any port 22 proto tcp

cautionFirewall

Block an IP address or subnet with ufw

#ufw insert 1 deny from 203.0.113.0/24

cautionFirewall

Close a port in ufw by deleting its rule

#ufw delete allow 8080/tcp

cautionFirewall

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

harmlessFirewall

Delete a ufw rule by number

cautionFirewall

Enable ufw logging

#ufw logging low

cautionFirewall

Enable ufw without locking yourself out

#ufw allow 22/tcp && ufw enable

destructiveFirewall

List ufw rules with numbers

#ufw status numbered

harmlessFirewall

Open a port with ufw

#ufw allow 443/tcp

cautionFirewall

Show detailed ufw status and default policies

#ufw status verbose

harmlessFirewall