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// Other services

Port 2372: LanMessenger

Port 2372 is assigned by IANA to lanmessenger (LanMessenger).

2372

How lanmessenger works

Other services
client:2372lanmessengerresponse client:2372lanmessengerresponse

The client sends a request to port 2372 and the lanmessenger 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 2372 dangerous?

We have no specific security note for port 2372. 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 2372

ServicePortTransportDescriptionReferenceUpdated
lanmessenger 2372 TCP, UDP LanMessenger - 2008-02-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 2372, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2372'      # process listening on 2372
sudo lsof -nP -i :2372

macOS

sudo lsof -nP -i :2372

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2372 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2372
netstat -ano | findstr :2372

From another machine

nmap -p 2372 -sV <host>
sudo nmap -sU -p 2372 <host>
nc -zv <host> 2372

Block it in the firewall

sudo ufw deny 2372/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2372" -Direction Inbound -LocalPort 2372 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2372 used for?

Port 2372 is assigned by IANA to lanmessenger (LanMessenger).

Is port 2372 TCP or UDP?

Port 2372 is registered for TCP and UDP.

Is it safe to open port 2372?

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 2372 is open?

On Linux run "ss -ltnup 'sport = :2372'", on macOS "lsof -nP -i :2372", and on Windows "netstat -ano | findstr :2372" to see the local process. From another machine, "nmap -p 2372 <host>" shows whether it is reachable.

05 Related
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