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Port 4790 (vxlan-gpe)

IANA assigns port 4790 to vxlan-gpe: Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN).

Registered (user) port, 1024-49151 UDP

Port 4790 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
vxlan-gpe UDP Generic Protocol Extension for Virtual eXtensible Local Area Network (VXLAN) Lawrence Kreeger -

Registry dates for this port: registered 2014-08-26.

Check what is listening on port 4790

Linux: UDP 4790
sudo ss -ulnp 'sport = :4790'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4790
Windows (Command Prompt)
netstat -ano | findstr :4790
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 4790

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4790

Block port 4790 in the firewall

ufw
sudo ufw deny 4790/udp
iptables
sudo iptables -A INPUT -p udp --dport 4790 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4790 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4790' -Direction Inbound -Protocol UDP -LocalPort 4790 -Action Block

Related ports

4788xmcp4789VXLAN4791roce4792unified-bus

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