Function Test-PortAvailable {     param(     [validaterange(1,65535)]     [int]$Port     )     $sockt=New-Object System.Net.Sockets.Socket -ArgumentList 'InterNetwork','Stream','TCP'     $ip = (Get-NetIPConfiguration).IPv4Address |         Select -First 1 -ExpandProperty IPAddress     $ipAddress = [Net.IPAddress]::Parse($ip)     Try     {         $ipEndpoint = New-Object System.Net.IPEndPoint $ipAddress,$port         $sockt.Bind($ipEndpoint)         return $true     }     Catch [exception]     {         return $false     }     Finally     {         $sockt.Close()     } }

PS> Test-PortAvailable -Port 102 True PS> Test-PortAvailable -Port 1025 False