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Portscan with Powershell
[Update 16-05-2009 – Format update]
So I found myself in need of a tool which could check whether or not one or more ports are open on a large amount of servers.
I ended up with this in powershell:
param([string]$list1,[string]$list2) if ($list1 -eq ""){ Write-Host "Please supply Host-list!!" -ForegroundColor Red break } If ($list2 -eq ""){ Write-Host "Please supply Port-List!!" -ForegroundColor Red break } [Array]$hostlist = Get-Content $list1 [Array]$ports = Get-Content $list2 $ErrorActionPreference = "SilentlyContinue" $ping = new-object System.Net.NetworkInformation.Ping foreach ($ip in $hostlist) { $rslt = $ping.send($ip) if (! $?){ Write-Host "Host: $ip - not found" -ForegroundColor Red } else { if ($rslt.status.tostring() –eq “Success”) { write-host "Host: $ip - Ports: " -foregroundColor Green -NoNewline foreach ($port in $ports){ $socket = new-object System.Net.Sockets.TcpClient($ip, $port) if ($socket –eq $null) { write-host "$port," -ForegroundColor Red -NoNewline } else { write-host "$port,"-foregroundcolor Green -NoNewline $socket = $null } } } else { write-host "Host: $ip - down" -ForegroundColor Red } } Write-Host "" } $ping = $null
The script is executed in the following manner:
[ ] PS> .\script.ps1 hostlist.txt portlist.txt
In this version, the output of the script is not suited to be piped to a file, as port status is indicated with color.
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Categories: Powershell Scripts
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Poshcode.org
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I like what you’ve done here. I hope you don’t mind but I took this as a teaching opportunity for people just learning PowerShell and expanded on your solid start.
http://blog.sapien.com/index.php/2009/05/12/a-powershell-port-scan/
Hi there, awesome script and perfect for what i need, although i needed to output this to a file rather than screen. I’ve asked the same Q over at Powershellcommunity.org, but referenced your site, so hope you dont mind?
Steve
Hi,
how to specify whether it is TCP or UDP port?
Vlad
Nice man, dont need to find out myself now 😉 Although I am gonna modify it a little for my own purposes. Again Nice job!
Hi I have used your script but change it little, just to support port ranges.
Example 21,80,118,135-139,443,445,512-515,1023-1080,1433,1521,3389
Here is the code:
Function PortScan
{
param([string]$Hostname,[string]$PortList)
$PortArr = $Null
$tmpPortArr = $Null
$NumArr = $Null
# Turn off error pipeline
$ErrorActionPreference = “SilentlyContinue”
Write-Host “”
Write-Host “Check these ports:”
Write-Host $PortList
Write-Host “”
$tmpPortArr = @($PortList -split “,”)
foreach($Numb in $tmpPortArr)
{
if($Numb -match “-“)
{
$i = 0
$NumArr = $Numb -split “-“, 2
$PortArr += @([int]$NumArr[0])
do
{
$i++
$PortArr += @([int]$NumArr[0] + $i)
}
until ([int]$NumArr[1] -eq $PortArr[$PortArr.Length-1])
}
else
{
$PortArr += @($Numb)
}
}
$Ports = $PortArr
# Server Response
$ping = new-object System.Net.NetworkInformation.Ping
$Result = $ping.send($Hostname)
if ($Result.status.tostring() –eq “Success”) {
write-host “Host: $Hostname – Ports: ” -foregroundColor Green -NoNewline
foreach ($port in $Ports){
$socket = new-object System.Net.Sockets.TcpClient($Hostname, $port)
if ($socket –eq $null) {
write-host “$port, ” -ForegroundColor Red -NoNewline
}
else {
write-host “$port, “-foregroundcolor Green -NoNewline
$socket = $null
}
}
}
else {
write-host “Host: $Hostname – down” -ForegroundColor Red
}
$ping = $null
}
Thank you so much. Scanning for alive hosts is totally horrible: https://gist.github.com/mbrownnycnyc/9913361