$NETAdapters = netsh interface ipv4 show dnsservers
$filteredAdapters = @()
$Output = @()

$currentInterface = ""
foreach ($line in $NETAdapters) {
    if ($line -match 'Configuration for interface "(.*)"') {
        $currentInterface = $matches[1]
    } elseif ($currentInterface -ne "" -and $line -match "127.0.0.1") {
        $filteredAdapters += $currentInterface
        $currentInterface = ""
    }
}

$Interfacepath = @(
    "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces",
    "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\Interfaces"
)

$filteredInterfaces = @()
foreach ($path in $Interfacepath) {
    $Interfaces = Get-ChildItem -Path $path
    foreach ($interface in $Interfaces) {
        if ((Get-ItemProperty -Path $interface.PSPath).PSObject.Properties.Name -contains "NameServer") {
            $interfaceValue = Get-ItemPropertyValue -Path $interface.PSPath -Name 'NameServer'
            if ($interfaceValue -eq '127.0.0.1') {
                $filteredInterfaces += $interface.PSChildName
            }
        }
    }
}

if ($filteredAdapters.Count -gt 0) {
    $Output += "FOUND LOCALHOST DNS ENTRIES FOR $filteredAdapters"
} 
if ($filteredInterfaces.Count -gt 0) {
    $Output += "FOUND REGISTRY DNS ENTRIES FOR $filteredInterfaces"
}

if ($Output.Count -gt 0) {
    Write-Output $Output
    Exit 1
}

Else {
    Write-Output "No Issues Detected"
    Exit 0
}