If youre installing a DC which will have only a public interface, unbiding
the ms network client & file & printer sharing services from that nic will
cause errors & prevent you from accessing things like the GPO's, you'll also
get errors listed in the event log usually from the SclgNtfy service with
the event id 1002.
To get around this problem install the Loopback nic (listed in add/remove
hardware>Network Adapters>Microsoft>Microsoft Loopback Adapter), & bind the
ms net client & f&p sharing to it, place it on the top of the connections
list in Adapters & bindings. you dont need to assign it any ip info to this
nic as the apa assigned address is sufficient to make everything work.