I have choosen to use BIND DNS servers and am using the same name for both active directory and public DNS. I will be placing a firewall between the 2 BIND DNS servers and configuring 2 zones an internal and external. The only internal content that will be avaiable is through a web server in the active directory. On the external DNS zone do I need to add the _mscds, _sites, _tcp, _udp subdomains or any SRV records?