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Port 6080 (gue)

IANA assigns port 6080 to gue: Generic UDP Encapsulation.

Registered (user) port, 1024-49151 UDP

Port 6080 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
gue UDP Generic UDP Encapsulation Tom Herbert draft-herbert-gue-02

Registry dates for this port: registered 2015-03-05.

Check what is listening on port 6080

Linux: UDP 6080
sudo ss -ulnp 'sport = :6080'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6080
Windows (Command Prompt)
netstat -ano | findstr :6080
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 6080

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6080

Block port 6080 in the firewall

ufw
sudo ufw deny 6080/udp
iptables
sudo iptables -A INPUT -p udp --dport 6080 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6080 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6080' -Direction Inbound -Protocol UDP -LocalPort 6080 -Action Block

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6076msft-dpm-cert6077iconstructsrv6081Geneve6082p25cai

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