Ejercicios de PowerShell: comprobar si un puerto está abierto o no - Operating systems, scripting, PowerShell and security

Si está abierto parece que no hay resultado

$tcpobject = New-Object System.Net.Sockets.TcpClient 
$connect = $tcpobject.BeginConnect("127.0.0.1",25,$null,$null)
    
# wait for the connection no longer than $timeoutMilliseconds 
$wait = $connect.AsyncWaitHandle.WaitOne($timeoutMilliseconds,$false)
$tcpobject.EndConnect($connect)

Si no está abierto hay resultado

$tcpobject = New-Object System.Net.Sockets.TcpClient 
$connect = $tcpobject.BeginConnect("127.0.0.1",215,$null,$null)
    
# wait for the connection no longer than $timeoutMilliseconds 
$wait = $connect.AsyncWaitHandle.WaitOne($timeoutMilliseconds,$false)
$tcpobject.EndConnect($connect)