Testing for open port with Telnet

General
1

I'm trying to figure out how I can test for open port using telnet. All I want to do is test to see if the port on my Telnet Server is Open or Closed (True or False)

Can somebody help me get started?

2

Is there a connection between your question and Node-RED?

3

I've got this figure out, I'm going to take a different approach.

Thanks for the effort.

4

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