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// Other services

Port 2355: psdbserver

Port 2355 is assigned by IANA to psdbserver (psdbserver).

2355

How psdbserver works

Other services
client:2355psdbserverresponse client:2355psdbserverresponse

The client sends a request to port 2355 and the psdbserver 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 2355 dangerous?

We have no specific security note for port 2355. 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 2355

ServicePortTransportDescriptionReferenceUpdated
psdbserver 2355 TCP, UDP psdbserver - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2355, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2355'      # process listening on 2355
sudo lsof -nP -i :2355

macOS

sudo lsof -nP -i :2355

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2355 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2355
netstat -ano | findstr :2355

From another machine

nmap -p 2355 -sV <host>
sudo nmap -sU -p 2355 <host>
nc -zv <host> 2355

Block it in the firewall

sudo ufw deny 2355/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2355" -Direction Inbound -LocalPort 2355 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2355 used for?

Port 2355 is assigned by IANA to psdbserver (psdbserver).

Is port 2355 TCP or UDP?

Port 2355 is registered for TCP and UDP.

Is it safe to open port 2355?

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 2355 is open?

On Linux run "ss -ltnup 'sport = :2355'", on macOS "lsof -nP -i :2355", and on Windows "netstat -ano | findstr :2355" to see the local process. From another machine, "nmap -p 2355 <host>" shows whether it is reachable.

05 Related
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