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// Other services

Port 2937: PNACONSULT-LM

Port 2937 is assigned by IANA to pnaconsult-lm (PNACONSULT-LM).

2937

How pnaconsult-lm works

Other services
client:2937pnaconsult-lmresponse client:2937pnaconsult-lmresponse

The client sends a request to port 2937 and the pnaconsult-lm 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 2937 dangerous?

We have no specific security note for port 2937. 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 2937

ServicePortTransportDescriptionReferenceUpdated
pnaconsult-lm 2937 TCP, UDP PNACONSULT-LM - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2937, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2937'      # process listening on 2937
sudo lsof -nP -i :2937

macOS

sudo lsof -nP -i :2937

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2937 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2937
netstat -ano | findstr :2937

From another machine

nmap -p 2937 -sV <host>
sudo nmap -sU -p 2937 <host>
nc -zv <host> 2937

Block it in the firewall

sudo ufw deny 2937/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2937" -Direction Inbound -LocalPort 2937 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2937 used for?

Port 2937 is assigned by IANA to pnaconsult-lm (PNACONSULT-LM).

Is port 2937 TCP or UDP?

Port 2937 is registered for TCP and UDP.

Is it safe to open port 2937?

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 2937 is open?

On Linux run "ss -ltnup 'sport = :2937'", on macOS "lsof -nP -i :2937", and on Windows "netstat -ano | findstr :2937" to see the local process. From another machine, "nmap -p 2937 <host>" shows whether it is reachable.

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