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Local dataset, no network
// Other services

Port 6140: Pulsonix Network License Service

Port 6140 is assigned by IANA to pulsonixnls (Pulsonix Network License Service).

6140

How pulsonixnls works

Other services
client:6140pulsonixnlsresponse client:6140pulsonixnlsresponse

The client sends a request to port 6140 and the pulsonixnls 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 6140 dangerous?

We have no specific security note for port 6140. 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 6140

ServicePortTransportDescriptionReferenceUpdated
pulsonixnls 6140 TCP, UDP Pulsonix Network License Service - 2008-02-28

// source: IANA service name and port number registry

03 Check it

Which program uses port 6140, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6140'      # process listening on 6140
sudo lsof -nP -i :6140

macOS

sudo lsof -nP -i :6140

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6140 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6140
netstat -ano | findstr :6140

From another machine

nmap -p 6140 -sV <host>
sudo nmap -sU -p 6140 <host>
nc -zv <host> 6140

Block it in the firewall

sudo ufw deny 6140/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6140" -Direction Inbound -LocalPort 6140 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6140 used for?

Port 6140 is assigned by IANA to pulsonixnls (Pulsonix Network License Service).

Is port 6140 TCP or UDP?

Port 6140 is registered for TCP and UDP.

Is it safe to open port 6140?

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 6140 is open?

On Linux run "ss -ltnup 'sport = :6140'", on macOS "lsof -nP -i :6140", and on Windows "netstat -ano | findstr :6140" to see the local process. From another machine, "nmap -p 6140 <host>" shows whether it is reachable.

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