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// Other services

Port 3089: ParaTek Agent Linking

Port 3089 is assigned by IANA to ptk-alink (ParaTek Agent Linking).

3089

How ptk-alink works

Other services
client:3089ptk-alinkresponse client:3089ptk-alinkresponse

The client sends a request to port 3089 and the ptk-alink 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 3089 dangerous?

We have no specific security note for port 3089. 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 3089

ServicePortTransportDescriptionReferenceUpdated
ptk-alink 3089 TCP, UDP ParaTek Agent Linking - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3089, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3089'      # process listening on 3089
sudo lsof -nP -i :3089

macOS

sudo lsof -nP -i :3089

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3089 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3089
netstat -ano | findstr :3089

From another machine

nmap -p 3089 -sV <host>
sudo nmap -sU -p 3089 <host>
nc -zv <host> 3089

Block it in the firewall

sudo ufw deny 3089/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3089" -Direction Inbound -LocalPort 3089 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3089 used for?

Port 3089 is assigned by IANA to ptk-alink (ParaTek Agent Linking).

Is port 3089 TCP or UDP?

Port 3089 is registered for TCP and UDP.

Is it safe to open port 3089?

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 3089 is open?

On Linux run "ss -ltnup 'sport = :3089'", on macOS "lsof -nP -i :3089", and on Windows "netstat -ano | findstr :3089" to see the local process. From another machine, "nmap -p 3089 <host>" shows whether it is reachable.

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