Check port on Janus Presence Server on Windows box using Powershell - example for Babylon Server

gistfile1.ps1

#Reference for System.Net.Sockets.TcpClient ==> https://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient(v=vs.110).aspx
# Paste parts 1 + 2 and see response from server.  Then Paste part 3 to cleanup.
#===================
# 1. Get Connected
#===================
$tcpClient = New-Object System.Net.Sockets.TcpClient
$tcpClient.Connect("babylon.vrsites.com", 5566)
$tcpClient.Connected
#===========================
# 2. Write data and see response
#============================
$stream = $tcpClient.GetStream()
$streamWriter = New-Object System.IO.StreamWriter($stream)
$streamWriter.WriteLine("{`"method`":`"logon`",`"data`":{`"userId`":`"oculushut`", `"version`":`"39.5`",`"roomId`":`"345678354764987457`"}}")
$streamWriter.Flush()
Start-Sleep -s 1
$streamReader = New-Object System.IO.StreamReader($stream)
$streamReader.readLine()

#===========================
# 3.  Cleanup
#============================
$streamReader.Close()
$streamWriter.Close()
$stream.Close()
$tcpClient.Close()

You need to alter the URL in this bit if you want to connect to anything other than babylon.vrsites.com:

$tcpClient.Connect("babylon.vrsites.com", 5566)