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Port 6082 (p25cai)

IANA assigns port 6082 to p25cai: APCO Project 25 Common Air Interface - UDP encapsulation.

Registered (user) port, 1024-49151 UDP

Port 6082 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
p25cai UDP APCO Project 25 Common Air Interface - UDP encapsulation APCO Project -

Registry dates for this port: registered 2011-05-13.

Check what is listening on port 6082

Linux: UDP 6082
sudo ss -ulnp 'sport = :6082'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6082
Windows (Command Prompt)
netstat -ano | findstr :6082
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 6082

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6082

Block port 6082 in the firewall

ufw
sudo ufw deny 6082/udp
iptables
sudo iptables -A INPUT -p udp --dport 6082 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6082 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6082' -Direction Inbound -Protocol UDP -LocalPort 6082 -Action Block

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6080gue6081Geneve6083miami-bcast6084reload-config

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