Public/Test-Port.ps1
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function Test-Port { [CmdletBinding()] Param( [string] $Server, [int[]] $Ports = 135, [int] $TimeOut = 1000 ) foreach ($Port in $Ports) { #Write-Verbose "Test-Port - $Server`:$Port Start" $TcpClient = New-Object system.Net.Sockets.TcpClient $iar = $TcpClient.BeginConnect($server, $port, $null, $null) # Set the Wait time $Wait = $iar.AsyncWaitHandle.WaitOne($TimeOut, $false) # Check to see if the connection is done if (!$Wait) { # Close the connection and report TimeOut $TcpClient.Close() Write-Verbose "Test-Port - $Server`:$Port Connection TimeOut" return $false } else { # Close the connection and report the error if there is one $error.Clear() $TcpClient.EndConnect($iar) | Out-Null if (!$?) { Write-Verbose "Test-Port - $Server`:$Port Error: $($error[0])" $Failed = $true } $TcpClient.Close() } if ($Failed) { break } } if ($Failed) { return $false # Failed on all or just one of tested ports } else { return $true # Established } } |