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// Other services

Port 4311: P6R Secure Server Management Console

Port 4311 is assigned by IANA to p6ssmc (P6R Secure Server Management Console).

4311

How p6ssmc works

Other services
client:4311p6ssmcresponse client:4311p6ssmcresponse

The client sends a request to port 4311 and the p6ssmc service answers.

Transport
TCP
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 4311 dangerous?

We have no specific security note for port 4311. 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 4311

ServicePortTransportDescriptionReferenceUpdated
p6ssmc 4311 TCP P6R Secure Server Management Console - 2010-01-21
-4311-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4311, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4311'      # process listening on 4311
sudo lsof -nP -i :4311

macOS

sudo lsof -nP -i :4311

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4311 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4311
netstat -ano | findstr :4311

From another machine

nmap -p 4311 -sV <host>
nc -zv <host> 4311

Block it in the firewall

sudo ufw deny 4311/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4311" -Direction Inbound -LocalPort 4311 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4311 used for?

Port 4311 is assigned by IANA to p6ssmc (P6R Secure Server Management Console).

Is port 4311 TCP or UDP?

Port 4311 is registered for TCP.

Is it safe to open port 4311?

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 4311 is open?

On Linux run "ss -ltnup 'sport = :4311'", on macOS "lsof -nP -i :4311", and on Windows "netstat -ano | findstr :4311" to see the local process. From another machine, "nmap -p 4311 <host>" shows whether it is reachable.

05 Related
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