IANA assigns port 1390 to iclpv-sc: Storage Controller.
sudo ss -tlnp 'sport = :1390'sudo ss -ulnp 'sport = :1390'sudo lsof -nP -i :1390sudo netstat -tlnp | grep ':1390 'netstat -ano | findstr :1390Get-NetTCPConnection -LocalPort 1390 -State Listen | Select LocalAddress,OwningProcessnc -vz -w 5 HOST 1390Test-NetConnection HOST -Port 1390nc -vzu -w 5 HOST 1390sudo ufw deny 1390/tcpsudo iptables -A INPUT -p tcp --dport 1390 -j DROPsudo nft add rule inet filter input tcp dport 1390 dropNew-NetFirewallRule -DisplayName 'Block TCP 1390' -Direction Inbound -Protocol TCP -LocalPort 1390 -Action Blocksudo ufw deny 1390/udpsudo iptables -A INPUT -p udp --dport 1390 -j DROPsudo nft add rule inet filter input udp dport 1390 dropNew-NetFirewallRule -DisplayName 'Block UDP 1390' -Direction Inbound -Protocol UDP -LocalPort 1390 -Action BlockAll port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.