Check and set DNS for primary interface to OpenDNS

Set-OpenDNSServers.ps1

$DnsServers = @("208.67.220.220", "208.67.222.222")

$Route = Get-NetRoute -DestinationPrefix 0.0.0.0/0
$IfIndex = $Route.ifIndex
$DnsAddresses = Get-DnsClientServerAddress -InterfaceIndex $IfIndex -AddressFamily IPv4

$DnsAddresses.ServerAddresses | ForEach-Object {
  if ($_ -notin $DnsServers) {
    Write-Host "Fixing DNS Servers"
    Set-DnsClientServerAddress -InterfaceIndex $IfIndex -ServerAddresses $DnsServers
    break;
  }
}