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How to hide 2nd NIC ip addres of Windows server in DNS

I have a Windows 2003 server, multihomed with 2 NICs; both ip addresses shown up in our DNS server (which is the same computer), plus this computer is also our AD controller. I only want DNS to know about the 1st NIC's ip address.

I have done what is listed in the article below, but the 2nd NIC's ip address keep showing up after a while.
http://www.enterprisenetworkingplanet.com/netos/article.php/757021

Any ideas? Thanks!
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Darius Ghassem
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Select the option on TCP/IP prop- Do not register this address with dns.

see the attached screenshot.
Untitled-picture.png
make sure the register this connection's address tab is unchecked.
any qns.. let me know..

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The technet article on restricting the DNS server (which is the multihomed server itself) to listen to the 1st NIC only COMPLETES the solution....the ip address of its 2nd NIC disappears in DNS right after I set not to listen on the 2nd NIC.
Why a grade of "B"?