DNS May Not Respond to Queries After Applying SP4

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256986 Description of the Microsoft Windows Registry
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:
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.
More information
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.

   HKEY_LOCAL_MACHINE\system\CurrentControlSet\Services\DNS\Parameters   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.
SP4 cache query failed failure NS record records

Article ID: 199909 - Last Review: 01/09/2015 15:45:28 - Revision: 4.0

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