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// Other services

Port 1952: mpnjsc

Port 1952 is assigned by IANA to mpnjsc (mpnjsc).

1952

How mpnjsc works

Other services
client:1952mpnjscresponse client:1952mpnjscresponse

The client sends a request to port 1952 and the mpnjsc 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 1952 dangerous?

We have no specific security note for port 1952. 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 1952

ServicePortTransportDescriptionReferenceUpdated
mpnjsc 1952 TCP, UDP mpnjsc - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1952, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1952'      # process listening on 1952
sudo lsof -nP -i :1952

macOS

sudo lsof -nP -i :1952

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1952 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1952
netstat -ano | findstr :1952

From another machine

nmap -p 1952 -sV <host>
sudo nmap -sU -p 1952 <host>
nc -zv <host> 1952

Block it in the firewall

sudo ufw deny 1952/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1952" -Direction Inbound -LocalPort 1952 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1952 used for?

Port 1952 is assigned by IANA to mpnjsc (mpnjsc).

Is port 1952 TCP or UDP?

Port 1952 is registered for TCP and UDP.

Is it safe to open port 1952?

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 1952 is open?

On Linux run "ss -ltnup 'sport = :1952'", on macOS "lsof -nP -i :1952", and on Windows "netstat -ano | findstr :1952" to see the local process. From another machine, "nmap -p 1952 <host>" shows whether it is reachable.

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