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I will give you an example, this was for a recent project we had with a machine that requires to be connected to the internet at all times through a VPN connection.

How to setup Windows VPN to automatically reconnect after connection loss using PowerShell?

Using PowerShell Script
Create a PowerShell Script to Monitor and Reconnect VPN:

Open Notepad and paste the following script:
In powershell

$vpnName = "Your_VPN_Connection_Name"
$username = "your_username"
$password = "your_password"

while ($true) {
    $vpnConnection = Get-VpnConnection -Name $vpnName
    if ($vpnConnection.ConnectionStatus -ne "Connected") {
        rasdial $vpnName $username $password
    }
    Start-Sleep -Seconds 60
}
Replace $vpnName, $username, and $password with your VPN connection details.
Save this file with a .ps1 extension, e.g., vpn_reconnect.ps1.
Set Up Task Scheduler to Run the PowerShell Script:

Follow the same steps as in Method 2, but when selecting the program to start, use powershell.exe and add the script path as an argument.
Example: powershell.exe -File "C:\path\to\your\vpn_reconnect.ps1"

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