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// Other services

Port 4352: Projector Link

Port 4352 is assigned by IANA to pjlink (Projector Link).

4352

How pjlink works

Other services
client:4352pjlinkresponse client:4352pjlinkresponse

The client sends a request to port 4352 and the pjlink 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 4352 dangerous?

We have no specific security note for port 4352. 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 4352

ServicePortTransportDescriptionReferenceUpdated
pjlink 4352 TCP, UDP Projector Link - 2005-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 4352, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4352'      # process listening on 4352
sudo lsof -nP -i :4352

macOS

sudo lsof -nP -i :4352

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4352 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4352
netstat -ano | findstr :4352

From another machine

nmap -p 4352 -sV <host>
sudo nmap -sU -p 4352 <host>
nc -zv <host> 4352

Block it in the firewall

sudo ufw deny 4352/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4352" -Direction Inbound -LocalPort 4352 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4352 used for?

Port 4352 is assigned by IANA to pjlink (Projector Link).

Is port 4352 TCP or UDP?

Port 4352 is registered for TCP and UDP.

Is it safe to open port 4352?

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 4352 is open?

On Linux run "ss -ltnup 'sport = :4352'", on macOS "lsof -nP -i :4352", and on Windows "netstat -ano | findstr :4352" to see the local process. From another machine, "nmap -p 4352 <host>" shows whether it is reachable.

05 Related
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