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Port 5116 (emb-proj-cmd)

IANA assigns port 5116 to emb-proj-cmd: EPSON Projecter Image Transfer.

Registered (user) port, 1024-49151 UDP

Port 5116 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
emb-proj-cmd UDP EPSON Projecter Image Transfer SEIKO EPSON 4 -

Registry dates for this port: registered 2008-11-17.

Check what is listening on port 5116

Linux: UDP 5116
sudo ss -ulnp 'sport = :5116'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5116
Windows (Command Prompt)
netstat -ano | findstr :5116
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 5116

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5116

Block port 5116 in the firewall

ufw
sudo ufw deny 5116/udp
iptables
sudo iptables -A INPUT -p udp --dport 5116 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5116 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5116' -Direction Inbound -Protocol UDP -LocalPort 5116 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.