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Port 6109 (globecast-id)

IANA assigns port 6109 to globecast-id: GLOBECAST-ID.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
globecast-id TCP GLOBECAST-ID Piers Scannell 2 -
globecast-id UDP GLOBECAST-ID Piers Scannell 2 -

Check what is listening on port 6109

Linux: is anything listening on TCP 6109?
sudo ss -tlnp 'sport = :6109'
Linux: UDP 6109
sudo ss -ulnp 'sport = :6109'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6109
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6109 '
Windows (Command Prompt)
netstat -ano | findstr :6109
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6109 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6109
From Windows
Test-NetConnection HOST -Port 6109
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6109

Block port 6109 in the firewall

ufw
sudo ufw deny 6109/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6109 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6109 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6109' -Direction Inbound -Protocol TCP -LocalPort 6109 -Action Block
ufw
sudo ufw deny 6109/udp
iptables
sudo iptables -A INPUT -p udp --dport 6109 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6109 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6109' -Direction Inbound -Protocol UDP -LocalPort 6109 -Action Block

Related ports

6107etc-control6108sercomm-scadmin6110softcm6111spc

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.