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// Other services

Port 2653: Sonus

Port 2653 is assigned by IANA to sonus (Sonus).

2653

How sonus works

Other services
client:2653sonusresponse client:2653sonusresponse

The client sends a request to port 2653 and the sonus 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 2653 dangerous?

We have no specific security note for port 2653. 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 2653

ServicePortTransportDescriptionReferenceUpdated
sonus 2653 TCP, UDP Sonus - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2653, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2653'      # process listening on 2653
sudo lsof -nP -i :2653

macOS

sudo lsof -nP -i :2653

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2653 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2653
netstat -ano | findstr :2653

From another machine

nmap -p 2653 -sV <host>
sudo nmap -sU -p 2653 <host>
nc -zv <host> 2653

Block it in the firewall

sudo ufw deny 2653/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2653" -Direction Inbound -LocalPort 2653 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2653 used for?

Port 2653 is assigned by IANA to sonus (Sonus).

Is port 2653 TCP or UDP?

Port 2653 is registered for TCP and UDP.

Is it safe to open port 2653?

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 2653 is open?

On Linux run "ss -ltnup 'sport = :2653'", on macOS "lsof -nP -i :2653", and on Windows "netstat -ano | findstr :2653" to see the local process. From another machine, "nmap -p 2653 <host>" shows whether it is reachable.

05 Related
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