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// Other services

Port 2972: PMSM Webrctl

Port 2972 is assigned by IANA to pmsm-webrctl (PMSM Webrctl).

2972

How pmsm-webrctl works

Other services
client:2972pmsm-webrctlresponse client:2972pmsm-webrctlresponse

The client sends a request to port 2972 and the pmsm-webrctl 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 2972 dangerous?

We have no specific security note for port 2972. 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 2972

ServicePortTransportDescriptionReferenceUpdated
pmsm-webrctl 2972 TCP, UDP PMSM Webrctl - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2972, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2972'      # process listening on 2972
sudo lsof -nP -i :2972

macOS

sudo lsof -nP -i :2972

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2972 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2972
netstat -ano | findstr :2972

From another machine

nmap -p 2972 -sV <host>
sudo nmap -sU -p 2972 <host>
nc -zv <host> 2972

Block it in the firewall

sudo ufw deny 2972/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2972" -Direction Inbound -LocalPort 2972 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2972 used for?

Port 2972 is assigned by IANA to pmsm-webrctl (PMSM Webrctl).

Is port 2972 TCP or UDP?

Port 2972 is registered for TCP and UDP.

Is it safe to open port 2972?

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 2972 is open?

On Linux run "ss -ltnup 'sport = :2972'", on macOS "lsof -nP -i :2972", and on Windows "netstat -ano | findstr :2972" to see the local process. From another machine, "nmap -p 2972 <host>" shows whether it is reachable.

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