Start-AOVPN

Function Start-AOVPN {

<#
.Synopsis
Attempts to reconnect to AOVPN if the connection fails unexpectedly.
.DESCRIPTION
Use this script with a scheduled task that is triggered by Event ID's such as waking from sleep \ hibernation \ network change etc.
- Firstly a check is made to see if the computer is on the corporate domain, if it is, then do nothing.
- Then, if the computer is not on the corporate domain and all the while that the AOVPN is not connected, attempt up to x times to reconnect before (optionally) giving up.
.PARAMETER AOVPNName
The name of your AOVPN implementation.  You can obtain this by running the following PowerShell cmdlet: (get-vpnconnection).name
.PARAMETER ConnectionAttempts
The number of reconnection attempts (1 to 60) to make following a 2 second pause until giving up.  Enter 0 to try until a connection is made. Defaults to 30 attempts if you do not use this parameter.
.EXAMPLE
Start-AOVPN -AOVPNName "my-aovpn"

Attempt to reconnect to the AOVPN and try 30 times with 2 second intervals between each attempt.  After 30 attempts, if the connection has not been made, then give up.
.EXAMPLE
Start-AOVPN -AOVPNName "my-aovpn" -ConnectionAttempts 10

Attempt to reconnect to the AOVPN and try 10 times with 2 second intervals between each attempt.  After 10 attempts, if the connection has not been made, then give up.
.EXAMPLE
Start-AOVPN -AOVPNName "my-aovpn" -ConnectionAttempts 0

Attempt to reconnect to the AOVPN and try indefinitely with 2 second intervals between each attempt until a connection has been re-established.
.NOTES
Version: 1.0.0
Date: 20190628
Created By: OzThe2
.LINK
https://fearthepanda.com
.LINK
https://leanpub.com/configmgr-DeployUsingPS
#>

    [CmdletBinding()]

    param(
        [Parameter(
            Position = 0,
            Mandatory = $true)]
            [string][ValidateNotNullOrEmpty()]$AOVPNName,
        [Parameter(
            Position = 1,
            Mandatory = $false)]        
            [Int32][ValidateRange(0,60)]$ConnectionAttempts = 30
    )

    BEGIN {
        $Tries = 0

        # -- Determine if we are domain authenticated or not --
        Get-NetConnectionProfile | % {if ($_.NetworkCategory -eq 'DomainAuthenticated') {$OnDomain = $true;break}else{$OnDomain = $false}}
    }
    
    PROCESS {       
        if (!($OnDomain)) {
            while ((Get-VpnConnection $AOVPNName).ConnectionStatus -ne 'Connected') {
                # -- Attempt to reconnect --
                start-process -FilePath $env:windir\system32\rasdial.exe -ArgumentList $AOVPNName
                                
                start-sleep -Seconds 2

                if ($ConnectionAttempts -gt 0) {
                    $tries++
                    # -- Attempted to reconnect xx times but failed - give up --
                    if ($tries -eq $ConnectionAttempts) {exit}
                }
            }
        }
    }
}