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Port 10111 (nmea-onenet)

IANA assigns port 10111 to nmea-onenet: NMEA OneNet multicast messaging.

Registered (user) port, 1024-49151 UDP

Port 10111 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
nmea-onenet UDP NMEA OneNet multicast messaging National Marine Electronics Association -

Registry dates for this port: registered 2011-09-15, last modified 2023-12-27.

Check what is listening on port 10111

Linux: UDP 10111
sudo ss -ulnp 'sport = :10111'
Linux / macOS: which process owns the port
sudo lsof -nP -i :10111
Windows (Command Prompt)
netstat -ano | findstr :10111
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 10111

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 10111

Block port 10111 in the firewall

ufw
sudo ufw deny 10111/udp
iptables
sudo iptables -A INPUT -p udp --dport 10111 -j DROP
nftables
sudo nft add rule inet filter input udp dport 10111 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 10111' -Direction Inbound -Protocol UDP -LocalPort 10111 -Action Block

Related ports

10107bctp-server10110nmea-018310113netiq-endpoint10114netiq-qcheck

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