<#
Basic Port Scanner

Example useage:
PowerShell -ExecutionPolicy Bypass .\scanner.ps1 <IP> <Start Port> <End Port>
PowerShell -ExecutionPolicy Bypass .\scanner.ps1 192.168.1.1 20 30
#>


$ErrorActionPreference= 'silentlycontinue' #ignore errors


#check for user input
if($args[0]){

    $ip = $args[0]
}else{
    write-host "IP Address needed!!!"
    exit
}

if($args[2]){
    $ports = $args[1]..$args[2]
}else{
    write-host "port range needed!!!"
    exit
}

foreach ($port in $ports){
 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

 }