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// Other services

Port 594: TPIP

Port 594 is assigned by IANA to tpip (TPIP).

594

How tpip works

Other services
client:594tpipresponse client:594tpipresponse

The client sends a request to port 594 and the tpip 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 594 dangerous?

We have no specific security note for port 594. 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 594

ServicePortTransportDescriptionReferenceUpdated
tpip 594 TCP, UDP TPIP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 594, and is it reachable?

Linux

sudo ss -ltnup 'sport = :594'      # process listening on 594
sudo lsof -nP -i :594

macOS

sudo lsof -nP -i :594

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 594 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 594
netstat -ano | findstr :594

From another machine

nmap -p 594 -sV <host>
sudo nmap -sU -p 594 <host>
nc -zv <host> 594

Block it in the firewall

sudo ufw deny 594/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 594" -Direction Inbound -LocalPort 594 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 594 used for?

Port 594 is assigned by IANA to tpip (TPIP).

Is port 594 TCP or UDP?

Port 594 is registered for TCP and UDP.

Is it safe to open port 594?

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 594 is open?

On Linux run "ss -ltnup 'sport = :594'", on macOS "lsof -nP -i :594", and on Windows "netstat -ano | findstr :594" to see the local process. From another machine, "nmap -p 594 <host>" shows whether it is reachable.

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