How to check open ports using powershell? -

i write script check radom ip or hostname see if ports open. here have far. scripts name checkports.

foreach ($xhost in $computername){     write-host $xhost     foreach ($port in $ports) {         $socket = new-object system.net.sockets.tcpclient                     $connection = $socket.beginconnect($xhost,$port,$null,$null)           $connection.asyncwaithandle.waitone(5000,$false) | out-null          if ($connection -eq $true)             { write-host = "$xhost port $port open" }         else             { write-host = "port $port closed" }                $socket.endconnect($connection)         $socket.close()    } } 

i input values in following way: .\checkport '192.186.1.5' or '192.168.1.5', '192.168.1.105', 192.168.1.110' | checkport

it doesn't seem reading ip address or displaying results.

i wondering if point out there show me doing wrong in script?

i've been able use 'test-port' function boe prox similar scan/ reporting functions, code available on poshcode:

http://poshcode.org/2514

when needed test ports directory health, built csv 'port' , 'protocol' columns, added port number/ protocol each port check. used in following script:

. .\test-port.ps1  $computerstocheck = get-content .\computers.txt $portlist = import-csv .\portlist.csv  foreach($entry in $portlist) {     $testportparams = @{         port = $($entry.port)     }        if( $($entry.protocol) -eq "tcp")     { $testportparams += @{ tcp = $true } }     else     { $testportparams += @{ udp = $true } }      $outlog = "porttest-$($entry.port)-$($entry.protocol).txt"      $computerstocheck |          test-port @testportparams |         sort-object -property open,name -descending |          format-table -auto -outvariable status     add-content -path $outlog -value $status  } 

you build feeder script build range of ip addresses , ports scan.