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Port 5066 (stanag-5066)

IANA assigns port 5066 to stanag-5066: STANAG-5066-SUBNET-INTF.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
stanag-5066 TCP STANAG-5066-SUBNET-INTF Rickard Berg -
stanag-5066 UDP STANAG-5066-SUBNET-INTF Rickard Berg -

Registry dates for this port: last modified 2025-10-22.

Check what is listening on port 5066

Linux: is anything listening on TCP 5066?
sudo ss -tlnp 'sport = :5066'
Linux: UDP 5066
sudo ss -ulnp 'sport = :5066'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5066
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5066 '
Windows (Command Prompt)
netstat -ano | findstr :5066
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5066 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5066
From Windows
Test-NetConnection HOST -Port 5066
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5066

Block port 5066 in the firewall

ufw
sudo ufw deny 5066/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5066 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5066 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5066' -Direction Inbound -Protocol TCP -LocalPort 5066 -Action Block
ufw
sudo ufw deny 5066/udp
iptables
sudo iptables -A INPUT -p udp --dport 5066 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5066 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5066' -Direction Inbound -Protocol UDP -LocalPort 5066 -Action Block

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