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// Other services

Port 5910: Air Traffic Services applications using ATN

Port 5910 is assigned by IANA to ats-atn (Air Traffic Services applications using ATN), cm (Context Management).

5910

How ats-atn works

Other services
client:5910ats-atnresponse client:5910ats-atnresponse

The client sends a request to port 5910 and the ats-atn service answers.

Transport
TCP · UDP · SCTP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 5910 dangerous?

We have no specific security note for port 5910. 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 5910

ServicePortTransportDescriptionReferenceUpdated
ats-atn 5910 TCP, UDP Air Traffic Services applications using ATN - 2022-08-08
cm 5910 SCTP Context Management - 2011-05-19

// source: IANA service name and port number registry

03 Check it

Which program uses port 5910, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5910'      # process listening on 5910
sudo lsof -nP -i :5910

macOS

sudo lsof -nP -i :5910

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5910 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5910
netstat -ano | findstr :5910

From another machine

nmap -p 5910 -sV <host>
sudo nmap -sU -p 5910 <host>
nc -zv <host> 5910

Block it in the firewall

sudo ufw deny 5910/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5910" -Direction Inbound -LocalPort 5910 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5910 used for?

Port 5910 is assigned by IANA to ats-atn (Air Traffic Services applications using ATN), cm (Context Management).

Is port 5910 TCP or UDP?

Port 5910 is registered for TCP and UDP and SCTP.

Is it safe to open port 5910?

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 5910 is open?

On Linux run "ss -ltnup 'sport = :5910'", on macOS "lsof -nP -i :5910", and on Windows "netstat -ano | findstr :5910" to see the local process. From another machine, "nmap -p 5910 <host>" shows whether it is reachable.

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