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// Other services

Port 6143: Watershed License Manager

Port 6143 is assigned by IANA to watershed-lm (Watershed License Manager).

6143

How watershed-lm works

Other services
client:6143watershed-lmresponse client:6143watershed-lmresponse

The client sends a request to port 6143 and the watershed-lm 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 6143 dangerous?

We have no specific security note for port 6143. 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 6143

ServicePortTransportDescriptionReferenceUpdated
watershed-lm 6143 TCP, UDP Watershed License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6143, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6143'      # process listening on 6143
sudo lsof -nP -i :6143

macOS

sudo lsof -nP -i :6143

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6143 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6143
netstat -ano | findstr :6143

From another machine

nmap -p 6143 -sV <host>
sudo nmap -sU -p 6143 <host>
nc -zv <host> 6143

Block it in the firewall

sudo ufw deny 6143/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6143" -Direction Inbound -LocalPort 6143 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6143 used for?

Port 6143 is assigned by IANA to watershed-lm (Watershed License Manager).

Is port 6143 TCP or UDP?

Port 6143 is registered for TCP and UDP.

Is it safe to open port 6143?

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 6143 is open?

On Linux run "ss -ltnup 'sport = :6143'", on macOS "lsof -nP -i :6143", and on Windows "netstat -ano | findstr :6143" to see the local process. From another machine, "nmap -p 6143 <host>" shows whether it is reachable.

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