And again, Powershell to the rescue...
I decided to write a small PowerShell function to perform the same concavity test as Telnet will, and in order to perform this test we will leverage the System.Net.Sockets.TcpClient .NET object,
You may read some more about it at:
https://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient%28v=vs.110%29.aspx
And now for the function:
# PowerShell PSTelnet function
function PSTelnet([string]$Destination, [int]$Port) {
# Create a TcpClient .NET object
$TCPClient = New-Object System.Net.Sockets.TcpClient
# Try & Catch
try {
$TCPClient.Connect($Destination, $Port)
} # END try
catch [System.Net.Sockets.SocketException] {
Write-Host -ForegroundColor Red "`nPSTelnet failed to connect with the following error:`n"
Write-Output -ForegroundColor Red $Error.Item(0)
} #END cache
# Test if the connection established
if ($TCPClient.Connected) {
Write-Host -ForegroundColor Green "`nPSTelnet Successfully Connected"
} # END if
# Close and reset the connection
$TCPClient.Close()
} # END of function
### Example of usage
PSTelnet -Destionation 127.0.0.1 -Port 445
### Example of output
PSTelnet Successfully Connected
Hope this helps,
Enjoy.
