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// Other services

Port 2351: psrserver

Port 2351 is assigned by IANA to psrserver (psrserver).

2351

How psrserver works

Other services
client:2351psrserverresponse client:2351psrserverresponse

The client sends a request to port 2351 and the psrserver 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 2351 dangerous?

We have no specific security note for port 2351. 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 2351

ServicePortTransportDescriptionReferenceUpdated
psrserver 2351 TCP, UDP psrserver - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2351, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2351'      # process listening on 2351
sudo lsof -nP -i :2351

macOS

sudo lsof -nP -i :2351

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2351 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2351
netstat -ano | findstr :2351

From another machine

nmap -p 2351 -sV <host>
sudo nmap -sU -p 2351 <host>
nc -zv <host> 2351

Block it in the firewall

sudo ufw deny 2351/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2351" -Direction Inbound -LocalPort 2351 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2351 used for?

Port 2351 is assigned by IANA to psrserver (psrserver).

Is port 2351 TCP or UDP?

Port 2351 is registered for TCP and UDP.

Is it safe to open port 2351?

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 2351 is open?

On Linux run "ss -ltnup 'sport = :2351'", on macOS "lsof -nP -i :2351", and on Windows "netstat -ano | findstr :2351" to see the local process. From another machine, "nmap -p 2351 <host>" shows whether it is reachable.

05 Related
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