from my experience you should always use the FQDN for configuring the DCs. I have seen many occasions when using the IP Address fails. This should definitely be part of the documentation, I will forward this to the appropriate team.
i had the same problem. In an TCPDUmp Trace i saw always the error "Wrong Computer Name"
Is this a normal behaviour of NTLM or is this an wrong behaviour with McAfee WebGateway? If only DNS Names should be used it would be usefull to change the GUI in this way.
i was just trying replacing the IPs by names and noticed another thing: the status always remains green, no matter what I enter in the Domain Controller field. Even if I enter bogus names that are not resolveable at all and point to nowhere, the status remains green.
Anyone ever saw this "LED" in another color? What does it indicate if not the connection to the DC?