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// Other services

Port 4007: pxc-splr

Port 4007 is assigned by IANA to pxc-splr (pxc-splr).

4007

How pxc-splr works

Other services
client:4007pxc-splrresponse client:4007pxc-splrresponse

The client sends a request to port 4007 and the pxc-splr 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 4007 dangerous?

We have no specific security note for port 4007. 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 4007

ServicePortTransportDescriptionReferenceUpdated
pxc-splr 4007 TCP, UDP pxc-splr - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4007, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4007'      # process listening on 4007
sudo lsof -nP -i :4007

macOS

sudo lsof -nP -i :4007

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4007 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4007
netstat -ano | findstr :4007

From another machine

nmap -p 4007 -sV <host>
sudo nmap -sU -p 4007 <host>
nc -zv <host> 4007

Block it in the firewall

sudo ufw deny 4007/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4007" -Direction Inbound -LocalPort 4007 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4007 used for?

Port 4007 is assigned by IANA to pxc-splr (pxc-splr).

Is port 4007 TCP or UDP?

Port 4007 is registered for TCP and UDP.

Is it safe to open port 4007?

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 4007 is open?

On Linux run "ss -ltnup 'sport = :4007'", on macOS "lsof -nP -i :4007", and on Windows "netstat -ano | findstr :4007" to see the local process. From another machine, "nmap -p 4007 <host>" shows whether it is reachable.

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