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// Other services

Port 5066: STANAG-5066-SUBNET-INTF

Port 5066 is assigned by IANA to stanag-5066 (STANAG-5066-SUBNET-INTF).

5066

How stanag-5066 works

Other services
client:5066stanag-5066response client:5066stanag-5066response

The client sends a request to port 5066 and the stanag-5066 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 5066 dangerous?

We have no specific security note for port 5066. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 5066

ServicePortTransportDescriptionReferenceUpdated
stanag-5066 5066 TCP, UDP STANAG-5066-SUBNET-INTF - 2025-10-22

// source: IANA service name and port number registry

03 Check it

Which program uses port 5066, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5066'      # process listening on 5066
sudo lsof -nP -i :5066

macOS

sudo lsof -nP -i :5066

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5066 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5066
netstat -ano | findstr :5066

From another machine

nmap -p 5066 -sV <host>
sudo nmap -sU -p 5066 <host>
nc -zv <host> 5066

Block it in the firewall

sudo ufw deny 5066/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5066" -Direction Inbound -LocalPort 5066 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5066 used for?

Port 5066 is assigned by IANA to stanag-5066 (STANAG-5066-SUBNET-INTF).

Is port 5066 TCP or UDP?

Port 5066 is registered for TCP and UDP.

Is it safe to open port 5066?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 5066 is open?

On Linux run "ss -ltnup 'sport = :5066'", on macOS "lsof -nP -i :5066", and on Windows "netstat -ano | findstr :5066" to see the local process. From another machine, "nmap -p 5066 <host>" shows whether it is reachable.

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