Basic Network Scanner

<#
Basic Network Scanner

Example useage:
PowerShell -ExecutionPolicy Bypass .\scanner.ps1 <Base IP> <Port>
PowerShell -ExecutionPolicy Bypass .\scanner.ps1 192.168.20 80
#>

$ErrorActionPreference= 'silentlycontinue' #ignore errors

#check for user input
if($args[0]){
    $baseIP = $args[0]
}else{
    $baseIP = "192.168.1"
}

if($args[1]){
    $port = $args[1]
}else{
    $port = 80
}

$rangeIP = 1..254

foreach ($range in $rangeIP){
  $ip = "{0}.{1}" -F $baseIP,$range
  write-host "Scanning $ip port $port..." -NoNewline

  if(Test-Connection -BufferSize 32 -Count 1 -Quiet -ComputerName $ip){
     $socket = new-object System.Net.Sockets.TcpClient($ip, $port)

     If($socket.Connected){
        $socket.Close()
        write-host "`r$ip port $port is open." -foregroundcolor "red" #if port open output
     }
   }
     write-host "`r" -NoNewline #clear line is port not open

}