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// Other services

Port 572: sonar

Port 572 is assigned by IANA to sonar (sonar).

572

How sonar works

Other services
client:572sonarresponse client:572sonarresponse

The client sends a request to port 572 and the sonar 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 572 dangerous?

We have no specific security note for port 572. 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 572

ServicePortTransportDescriptionReferenceUpdated
sonar 572 TCP, UDP sonar - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 572, and is it reachable?

Linux

sudo ss -ltnup 'sport = :572'      # process listening on 572
sudo lsof -nP -i :572

macOS

sudo lsof -nP -i :572

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 572 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 572
netstat -ano | findstr :572

From another machine

nmap -p 572 -sV <host>
sudo nmap -sU -p 572 <host>
nc -zv <host> 572

Block it in the firewall

sudo ufw deny 572/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 572" -Direction Inbound -LocalPort 572 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 572 used for?

Port 572 is assigned by IANA to sonar (sonar).

Is port 572 TCP or UDP?

Port 572 is registered for TCP and UDP.

Is it safe to open port 572?

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 572 is open?

On Linux run "ss -ltnup 'sport = :572'", on macOS "lsof -nP -i :572", and on Windows "netstat -ano | findstr :572" to see the local process. From another machine, "nmap -p 572 <host>" shows whether it is reachable.

05 Related
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