Сканер портов на PowerShell

Param(
    [parameter(Mandatory = $true,
      Position = 0)]
    [ValidatePattern("bd{1,3}.d{1,3}.d{1,3}.d{1,3}b")]
    [string]$StartAddress,
    [parameter(Mandatory = $true,
      Position = 1)]
    [ValidatePattern("bd{1,3}.d{1,3}.d{1,3}.d{1,3}b")]
    [string]$EndAddress,
    [switch]$ResolveHost,
    [switch]$ScanPort,
    [int[]]$Ports = @(21,22,23,53,69,71,80,98,110,139,111,389,443,445,1080,1433,2001,2049,3001,3128,5222,6667,6868,7777,7878,8080,1521,3306,3389,5801,5900,5555,5901),
    [int]$TimeOut = 10000
  )
function Invoke-TSPingSweep {
  
  Begin {
    $ping = New-Object System.Net.Networkinformation.Ping
  }
  Process {
    foreach($a in ($StartAddress.Split(".")[0]..$EndAddress.Split(".")[0])) {
      foreach($b in ($StartAddress.Split(".")[1]..$EndAddress.Split(".")[1])) {
        foreach($c in ($StartAddress.Split(".")[2]..$EndAddress.Split(".")[2])) {
          foreach($d in ($StartAddress.Split(".")[3]..$EndAddress.Split(".")[3])) {
            write-progress -activity PingSweep -status "$a.$b.$c.$d" -percentcomplete (($d/($EndAddress.Split(".")[3])) * 100)
            $pingStatus = $ping.Send("$a.$b.$c.$d",$TimeOut)
            if($pingStatus.Status -eq "Success") {
              if($ResolveHost) {
                write-progress -activity ResolveHost -status "$a.$b.$c.$d" -percentcomplete (($d/($EndAddress.Split(".")[3])) * 100) -Id 1
                $getHostEntry = [Net.DNS]::BeginGetHostEntry($pingStatus.Address, $null, $null)
              }
              if($ScanPort) {
                $openPorts = @()
                for($i = 1; $i -le $ports.Count;$i++) {
                  $port = $Ports[($i-1)]
                  write-progress -activity PortScan -status "$a.$b.$c.$d" -percentcomplete (($i/($Ports.Count)) * 100) -Id 2
                  $client = New-Object System.Net.Sockets.TcpClient
                  $beginConnect = $client.BeginConnect($pingStatus.Address,$port,$null,$null)
                  if($client.Connected) {
                    $openPorts += $port
                  } else {
                    # Wait
                    Start-Sleep -Milli $TimeOut
                    if($client.Connected) {
                      $openPorts += $port
                    }
                  }
                  $client.Close()
                }
              }
              if($ResolveHost) {
                $hostName = ([Net.DNS]::EndGetHostEntry([IAsyncResult]$getHostEntry)).HostName
              }
              # Return Object
              New-Object PSObject -Property @{
                IPAddress = "$a.$b.$c.$d";
                HostName = $hostName;
                Ports = $openPorts
              } | Select-Object IPAddress, HostName, Ports
            }
          }
        }
      }
    }
  }
  End {
  }
}
Invoke-TSPingSweep