IANA assigns port 1275 to ivcollector.
sudo ss -tlnp 'sport = :1275'sudo ss -ulnp 'sport = :1275'sudo lsof -nP -i :1275sudo netstat -tlnp | grep ':1275 'netstat -ano | findstr :1275Get-NetTCPConnection -LocalPort 1275 -State Listen | Select LocalAddress,OwningProcessnc -vz -w 5 HOST 1275Test-NetConnection HOST -Port 1275nc -vzu -w 5 HOST 1275sudo ufw deny 1275/tcpsudo iptables -A INPUT -p tcp --dport 1275 -j DROPsudo nft add rule inet filter input tcp dport 1275 dropNew-NetFirewallRule -DisplayName 'Block TCP 1275' -Direction Inbound -Protocol TCP -LocalPort 1275 -Action Blocksudo ufw deny 1275/udpsudo iptables -A INPUT -p udp --dport 1275 -j DROPsudo nft add rule inet filter input udp dport 1275 dropNew-NetFirewallRule -DisplayName 'Block UDP 1275' -Direction Inbound -Protocol UDP -LocalPort 1275 -Action BlockAll port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.