Testing open ports With PowerShell

April 20, 2022 Jeevan Bobba General, Powershell, Uncategorized, Windows 14

We can use PowerShell to test remote port connectivity without installing telnet and with the use of the Test-NetConnection command.

To check if the remote port is open or not we can use the Test-NetConnection command and it requires -The computer name parameter and -Port to check the remote port status.

Method 1

  1. Open PowerShell
  2. Modify the example command below, replacing IP address (or hostname) and port       
Test-NetConnection -ComputerName 192.168.1.1 -Port 443
Test-NetConnection -ComputerName hostname -Port 443

Methord 2
Use the script bellow to check if the port is open.
Create a text File in C:\temp\ with IP.txt. update With the IP address or hostname of the server you are interested in.
Create a text File in C:\temp\ with Ports.txt. update With the portnumber you like to check.

$HOSTFILE = Get-Content "C:\temp\IP.txt"
$PORTFILE = Get-Content "C:\temp\Ports.txt"
foreach ($HOSTLINE in $HOSTFILE)
{
foreach ($PORTLINE in $PORTFILE)
{
$STATUS=(New-Object System.Net.Sockets.TcpClient).ConnectAsync($HOSTLINE, $PORTLINE).Wait(1000)
Write-Output "$HOSTLINE, $PORTLINE, Status: $STATUS"
}
}

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