This behavior is by design. A DC will register all addresses in DNS. There are a few ways around this. One way would be to configure the DNS service to
listen on only the adapter that you want registered. Then delete all the entries for the second address. The DC will only have the one address registered now.
The only problem with this method is that if the second adapters address will be used to resolve DNS names. For instance, if the second adapter is an
external adapter and you are hosting a DNS domain name on your DNS server clients on the Internet would not be able to resolve records in your domain.
The second method would be to turn off registration altogether and manually add the records. For more info on this refer to: 246804 How to Enable/Disable
Windows 2000 Dynamic DNS Registrations
http://support.microsoft.com/?id=246804
Thank you,
Mike Johnston
Microsoft Network Support
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