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// Other services

Port 1231: menandmice-lpm

Port 1231 is assigned by IANA to menandmice-lpm (menandmice-lpm).

1231

How menandmice-lpm works

Other services
client:1231menandmice-lpmresponse client:1231menandmice-lpmresponse

The client sends a request to port 1231 and the menandmice-lpm 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 1231 dangerous?

We have no specific security note for port 1231. 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 1231

ServicePortTransportDescriptionReferenceUpdated
menandmice-lpm 1231 TCP, UDP menandmice-lpm - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1231, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1231'      # process listening on 1231
sudo lsof -nP -i :1231

macOS

sudo lsof -nP -i :1231

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1231 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1231
netstat -ano | findstr :1231

From another machine

nmap -p 1231 -sV <host>
sudo nmap -sU -p 1231 <host>
nc -zv <host> 1231

Block it in the firewall

sudo ufw deny 1231/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1231" -Direction Inbound -LocalPort 1231 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1231 used for?

Port 1231 is assigned by IANA to menandmice-lpm (menandmice-lpm).

Is port 1231 TCP or UDP?

Port 1231 is registered for TCP and UDP.

Is it safe to open port 1231?

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 1231 is open?

On Linux run "ss -ltnup 'sport = :1231'", on macOS "lsof -nP -i :1231", and on Windows "netstat -ano | findstr :1231" to see the local process. From another machine, "nmap -p 1231 <host>" shows whether it is reachable.

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