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// Other services

Port 3662: pserver

Port 3662 is assigned by IANA to pserver (pserver).

3662

How pserver works

Other services
client:3662pserverresponse client:3662pserverresponse

The client sends a request to port 3662 and the pserver 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 3662 dangerous?

We have no specific security note for port 3662. 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 3662

ServicePortTransportDescriptionReferenceUpdated
pserver 3662 TCP, UDP pserver - 2003-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 3662, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3662'      # process listening on 3662
sudo lsof -nP -i :3662

macOS

sudo lsof -nP -i :3662

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3662 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3662
netstat -ano | findstr :3662

From another machine

nmap -p 3662 -sV <host>
sudo nmap -sU -p 3662 <host>
nc -zv <host> 3662

Block it in the firewall

sudo ufw deny 3662/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3662" -Direction Inbound -LocalPort 3662 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3662 used for?

Port 3662 is assigned by IANA to pserver (pserver).

Is port 3662 TCP or UDP?

Port 3662 is registered for TCP and UDP.

Is it safe to open port 3662?

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 3662 is open?

On Linux run "ss -ltnup 'sport = :3662'", on macOS "lsof -nP -i :3662", and on Windows "netstat -ano | findstr :3662" to see the local process. From another machine, "nmap -p 3662 <host>" shows whether it is reachable.

05 Related
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