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Port 4793 (uet)

IANA assigns port 4793 to uet: Ultra Ethernet Transport.

Registered (user) port, 1024-49151 UDP

Port 4793 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
uet UDP Ultra Ethernet Transport Ultra Ethernet Consortium -

Registry dates for this port: registered 2025-06-16.

Check what is listening on port 4793

Linux: UDP 4793
sudo ss -ulnp 'sport = :4793'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4793
Windows (Command Prompt)
netstat -ano | findstr :4793
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 4793

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4793

Block port 4793 in the firewall

ufw
sudo ufw deny 4793/udp
iptables
sudo iptables -A INPUT -p udp --dport 4793 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4793 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4793' -Direction Inbound -Protocol UDP -LocalPort 4793 -Action Block

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