#port

5 one-liners with this tag.

Check if Plesk is listening on ports 8443 and 8880

#ss -tlnp | grep -E ':(8443|8880)\b'

Close a port in ufw by deleting its rule

#ufw delete allow 8080/tcp

cautionFirewall

Find out which process is using a port

#ss -tlnp 'sport = :80'

harmlessProcesses

Open a port with nftables

#nft insert rule inet filter input tcp dport 443 accept

cautionFirewall

Open a port with ufw

#ufw allow 443/tcp

cautionFirewall