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Port 4794 (veroce)

IANA assigns port 4794 to veroce: veRoCE Transport Protocol.

Registered (user) port, 1024-49151 UDP

Port 4794 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
veroce UDP veRoCE Transport Protocol ByteDance -

Registry dates for this port: registered 2026-03-06.

Check what is listening on port 4794

Linux: UDP 4794
sudo ss -ulnp 'sport = :4794'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4794
Windows (Command Prompt)
netstat -ano | findstr :4794
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 4794

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4794

Block port 4794 in the firewall

ufw
sudo ufw deny 4794/udp
iptables
sudo iptables -A INPUT -p udp --dport 4794 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4794 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4794' -Direction Inbound -Protocol UDP -LocalPort 4794 -Action Block

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4792unified-bus4793uet4800iims4801iwec

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