DNS May Not Respond to Queries After Applying SP4

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Article ID: 199909
This article was previously published under Q199909

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
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After applying Service Pack 4 to a Windows NT 4.0 DNS Server, the server will appear to stop resolving queries for hosts in certain remote domains. The first query for a host in one of these domains will succeed, but subsequent queries for other hosts in the same domain will fail.


The DNS code in Service Pack 4 was updated to support Ranking Data as defined in RFC 2181 section 5.4.1. After an answer from an authoritative NS has been cached, Windows NT DNS discontinues querying referrals to non-authoritative NSs. The authoritative NS is cached. If the authority does not have an associated glue record for the additional NSs, DNS will not be able to resolve the HOST RR for the other NSs, thus causing subsequent queries to fail.


To work around this problem, do the following:
  • Contact an administrator of the remote domain to verify that the name server in question has associated glue records for all authoritative NSs.
  • To change the behavior of the DNS server, acquire the latest DNS hotfix from Microsoft Product Support Services.


To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
  • Windows Service Pack Center -or-

  • 152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:


Microsoft has confirmed that this is a problem in Windows NT version 4.0 SP4. This problem was first corrected in Windows NT version 4.0 Service Pack 5.


After the hotfix has been acquired, add the following value to the registry:

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.


   Value Name: NoCacheRanking
   Data Type: REG_DWORD
   Value: 1


RFC 2181: Clarifications to the DNS Specification
RFC 1034: Domain Names - Concepts and Facilities
RFC 1035: Domain Names - Implementation and Specification
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.


Article ID: 199909 - Last Review: June 11, 2012 - Revision: 3.0
kbhotfixserver kbqfe kbbug kbfix KB199909

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