IANA assigns port 2635 to backburner: Back Burner.
sudo ss -tlnp 'sport = :2635'sudo ss -ulnp 'sport = :2635'sudo lsof -nP -i :2635sudo netstat -tlnp | grep ':2635 'netstat -ano | findstr :2635Get-NetTCPConnection -LocalPort 2635 -State Listen | Select LocalAddress,OwningProcessnc -vz -w 5 HOST 2635Test-NetConnection HOST -Port 2635nc -vzu -w 5 HOST 2635sudo ufw deny 2635/tcpsudo iptables -A INPUT -p tcp --dport 2635 -j DROPsudo nft add rule inet filter input tcp dport 2635 dropNew-NetFirewallRule -DisplayName 'Block TCP 2635' -Direction Inbound -Protocol TCP -LocalPort 2635 -Action Blocksudo ufw deny 2635/udpsudo iptables -A INPUT -p udp --dport 2635 -j DROPsudo nft add rule inet filter input udp dport 2635 dropNew-NetFirewallRule -DisplayName 'Block UDP 2635' -Direction Inbound -Protocol UDP -LocalPort 2635 -Action BlockAll port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.