CyberHunter
Local dataset, no network
// Other services

Port 31400: PACE license server

Port 31400 is assigned by IANA to pace-licensed (PACE license server).

31400

How pace-licensed works

Other services
client:31400pace-licensedresponse client:31400pace-licensedresponse

The client sends a request to port 31400 and the pace-licensed 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 31400 dangerous?

We have no specific security note for port 31400. 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 31400

ServicePortTransportDescriptionReferenceUpdated
pace-licensed 31400 TCP PACE license server - 2014-04-28
-31400-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 31400, and is it reachable?

Linux

sudo ss -ltnup 'sport = :31400'      # process listening on 31400
sudo lsof -nP -i :31400

macOS

sudo lsof -nP -i :31400

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 31400 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 31400
netstat -ano | findstr :31400

From another machine

nmap -p 31400 -sV <host>
nc -zv <host> 31400

Block it in the firewall

sudo ufw deny 31400/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 31400" -Direction Inbound -LocalPort 31400 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 31400 used for?

Port 31400 is assigned by IANA to pace-licensed (PACE license server).

Is port 31400 TCP or UDP?

Port 31400 is registered for TCP.

Is it safe to open port 31400?

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 31400 is open?

On Linux run "ss -ltnup 'sport = :31400'", on macOS "lsof -nP -i :31400", and on Windows "netstat -ano | findstr :31400" to see the local process. From another machine, "nmap -p 31400 <host>" shows whether it is reachable.

05 Related
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