Hello,
Hereunder an update about :
http://itfordummies.net/2014/01/24/test-networking-ports-with-powershell/
I just learned a new way of doing the same thing, without PowerShell 4 :
New-Object System.Net.Sockets.TCPClient –Argument "Localhost","80" #Hostname, PortNumber
When it’s opened :
When it’s closed :
This will work on PowerShell 2.