The `Get-VPNConnectionInfo ` function checks if the current internet connection is made through one of the known VPN providers. It fetches the current IP information from ipapi.co and compares the organization name (org field) against a predefined list of VPN providers.

GetVpnConnectionInfo.ps1

function Get-VPNConnectionInfo {
    $connectedVPN = $false 
    try {
        # Read the list of known VPN providers from a JSON file
        if (Test-Path -Path "./knownVPNproviders.json") {
            $knownVPNProviders = Get-Content -Path "./knownVPNproviders.json" | ConvertFrom-Json
        }
        else {
            Write-Warning "Warning: The file 'knownVPNproviders.json' was not found."
            $knownVPNProviders = @()
        }
    }
    catch {
        Write-Host "Error occurred while fetching VPN connection information: $($_.Exception.Message)" -ForegroundColor Red
    }

    try {
        $connect_info = (Invoke-WebRequest -UseBasicParsing -ErrorAction SilentlyContinue 'https://ipapi.co/json').Content | ConvertFrom-Json
        
        # Convert to PSCustomObject to ensure properties can be added
        $connect_info = [PSCustomObject]$connect_info
        # Add field to store VPN name
        if (-not $connect_info.psobject.Properties.Match('vpnName').Count) {
            Add-Member -InputObject $connect_info -MemberType NoteProperty -Name vpnName -Value ""
        }

        # If $connect_info.org contains substring VPN in it, set $connect_info.vpnName or leave ""
        if ($connect_info.org -match "VPN") {
            $connect_info.vpnName = $connect_info.org
            $connectedVPN = $true
        }
        else {
            $connect_info.vpnName = "Not connected to any known VPN " # Empty by default
        }

        if ($connect_info.org -in $knownVPNProviders) {
            $connectedVPN = $true
            $connect_info.vpnName = $connect_info.org
        }

        if ([IPAddress]::TryParse($connect_info.ip, [ref]$null)) {
            $connect_info = @{
                ip      = $connect_info.ip
                city    = $connect_info.city
                country = $connect_info.country
                org     = $connect_info.org
                vpnName = $connect_info.vpnName
            }
        }

        $vpnConnectionInfo = [PSCustomObject]@{
            connectedVPN = $connectedVPN
            connect_info = $connect_info
        }
        return $vpnConnectionInfo
    }
    catch {
        Write-Host "Error occurred while fetching VPN connection information: $($_.Exception.Message)" -ForegroundColor Red
        return $connectedVPN 
    }
}

knownVPNproviders.json

["VPNProvider1", "VPNProvider2", "other_provider_name_taken_from_org_field"]