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// Other services

Port 2569: Sonus Call Signal

Port 2569 is assigned by IANA to sonuscallsig (Sonus Call Signal).

2569

How sonuscallsig works

Other services
client:2569sonuscallsigresponse client:2569sonuscallsigresponse

The client sends a request to port 2569 and the sonuscallsig 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 2569 dangerous?

We have no specific security note for port 2569. 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 2569

ServicePortTransportDescriptionReferenceUpdated
sonuscallsig 2569 TCP, UDP Sonus Call Signal - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2569, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2569'      # process listening on 2569
sudo lsof -nP -i :2569

macOS

sudo lsof -nP -i :2569

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2569 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2569
netstat -ano | findstr :2569

From another machine

nmap -p 2569 -sV <host>
sudo nmap -sU -p 2569 <host>
nc -zv <host> 2569

Block it in the firewall

sudo ufw deny 2569/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2569" -Direction Inbound -LocalPort 2569 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2569 used for?

Port 2569 is assigned by IANA to sonuscallsig (Sonus Call Signal).

Is port 2569 TCP or UDP?

Port 2569 is registered for TCP and UDP.

Is it safe to open port 2569?

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 2569 is open?

On Linux run "ss -ltnup 'sport = :2569'", on macOS "lsof -nP -i :2569", and on Windows "netstat -ano | findstr :2569" to see the local process. From another machine, "nmap -p 2569 <host>" shows whether it is reachable.

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