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// Other services

Port 1946: tekpls

Port 1946 is assigned by IANA to tekpls (tekpls).

1946

How tekpls works

Other services
client:1946tekplsresponse client:1946tekplsresponse

The client sends a request to port 1946 and the tekpls 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 1946 dangerous?

We have no specific security note for port 1946. 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 1946

ServicePortTransportDescriptionReferenceUpdated
tekpls 1946 TCP, UDP tekpls - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1946, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1946'      # process listening on 1946
sudo lsof -nP -i :1946

macOS

sudo lsof -nP -i :1946

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1946 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1946
netstat -ano | findstr :1946

From another machine

nmap -p 1946 -sV <host>
sudo nmap -sU -p 1946 <host>
nc -zv <host> 1946

Block it in the firewall

sudo ufw deny 1946/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1946" -Direction Inbound -LocalPort 1946 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1946 used for?

Port 1946 is assigned by IANA to tekpls (tekpls).

Is port 1946 TCP or UDP?

Port 1946 is registered for TCP and UDP.

Is it safe to open port 1946?

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 1946 is open?

On Linux run "ss -ltnup 'sport = :1946'", on macOS "lsof -nP -i :1946", and on Windows "netstat -ano | findstr :1946" to see the local process. From another machine, "nmap -p 1946 <host>" shows whether it is reachable.

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