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// Other services

Port 4005: pxc-pin

Port 4005 is assigned by IANA to pxc-pin (pxc-pin).

4005

How pxc-pin works

Other services
client:4005pxc-pinresponse client:4005pxc-pinresponse

The client sends a request to port 4005 and the pxc-pin 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 4005 dangerous?

We have no specific security note for port 4005. 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 4005

ServicePortTransportDescriptionReferenceUpdated
pxc-pin 4005 TCP, UDP pxc-pin - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4005, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4005'      # process listening on 4005
sudo lsof -nP -i :4005

macOS

sudo lsof -nP -i :4005

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4005 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4005
netstat -ano | findstr :4005

From another machine

nmap -p 4005 -sV <host>
sudo nmap -sU -p 4005 <host>
nc -zv <host> 4005

Block it in the firewall

sudo ufw deny 4005/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4005" -Direction Inbound -LocalPort 4005 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4005 used for?

Port 4005 is assigned by IANA to pxc-pin (pxc-pin).

Is port 4005 TCP or UDP?

Port 4005 is registered for TCP and UDP.

Is it safe to open port 4005?

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 4005 is open?

On Linux run "ss -ltnup 'sport = :4005'", on macOS "lsof -nP -i :4005", and on Windows "netstat -ano | findstr :4005" to see the local process. From another machine, "nmap -p 4005 <host>" shows whether it is reachable.

05 Related
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