It’s important to know how to test if a remote port is available or not. Here is how to test a port on windows machine.
Simply run below command in powershell.
Test-NetConnection -ComputerName [IP/FQND] -Port [Port]
or shorten version
tnc -ComputerName [IP/FQND] -Port [Port]
Here is a sample of a success.

Here is a sample of a fail.

Sometimes powershell get stuck, just hit Enter a few times so the result will return.