DNS suppresses responses to EDNS packets in Windows 2000 Server (837928)
The information in this article applies to:
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
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: 256986 Description of the Microsoft Windows Registry SYMPTOMSA Microsoft Windows 2000 DNS server may suppress responses to DNS queries in cases where the extension mechanisms for DNS (EDNS) queries come from other servers that use Secure Network Address Translation (SecureNAT). In this scenario, all queries appear to come from the same DNS server.CAUSEThis problem occurs because a DNS server suppresses responses when the server detects a format error in a DNS request. Because DNS does not support EDNS, the EDNS query is detected as a bad format DNS query. After a Windows 2000 DNS server detects a bad format query, the server does not respond to the computer that sent the query for 60 seconds.RESOLUTIONHotfix informationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. PrerequisitesNo prerequisites are required. Restart requirementYou must restart the DNS service after you apply this hotfix. Hotfix replacement informationThis hotfix does not replace any other hotfixes. File information The English version of this hotfix has the file
attributes (or later) that are listed in the following table. The dates and
times for these files are listed in coordinated universal time (UTC). When you
view the file information, it is converted to local time. To find the
difference between UTC and local time, use the Time Zone tab
in the Date and Time tool in Control Panel.
Date Time Version Size File name
----------------------------------------------------
02-Mar-2004 11:32 5.0.2195.6903 327,440 Dns.exe
Hotfix activationThis hotfix is activated automatically when you install this
hotfix. (By default, Bad Sender Suppression is turned on.) To deactivate this
hotfix, see the "More Information" section of this
article. STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section of this article.REFERENCESFor additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base: 816915 New file naming schema for Microsoft Windows software update packages 824684 Description of the standard terminology that is used to describe Microsoft software updates
Modification Type: | Minor | Last Reviewed: | 2/9/2006 |
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Keywords: | kbHotfixServer kbBug kbfix kbQFE kbWin2000preSP5fix KB837928 kbAudITPRO |
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