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Article ID: 975792 - Last Review: November 20, 2009 - Revision: 2.0

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SYMPTOMS

Consider the following scenario:
  • On a computer that is running Windows Vista or Windows Server 2008, an application or service performs DNS resolution against a host name.
  • The host name is a numeric string that is composed completely of digits.
In this scenario, the DNS resolution fails. For example, you run a "PING 49721400465555" command to issue a PING packet to a host that is named 49721400465555. Then, you receive the following error message:
Ping request could not find host 49721400465555. Please check the name and try again.

CAUSE

The original definition host name validity in RFC 952 did not allow the first character of a host name to be a digit. This restriction was updated in RFC 1123 so that the first character of a host name could be a digit. However, Windows Vista and Windows Server 2008 use the original RFC 952 definition. Therefore, they cannot resolve completely numeric host names.

RESOLUTION

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have Windows Vista Service Pack 2 installed on the computer.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfix.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791  (http://support.microsoft.com/kb/935791/ ) How to obtain the latest service pack for Windows Vista Service Pack

File information

The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.
Windows Vista file information note

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are important to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.


Windows Vista or Windows Server 2008, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dnsapi.dll6.0.6001.22550167,42427-Oct-200913:04x86
Dnscacheugc.exe6.0.6001.2255025,08827-Oct-200910:52x86
Dnsrslvr.dll6.0.6001.2255086,52827-Oct-200913:04x86
Dnsapi.dll6.0.6002.22252168,44827-Oct-200912:48x86
Dnscacheugc.exe6.0.6002.2225225,08827-Oct-200910:36x86
Dnsrslvr.dll6.0.6002.2225286,52827-Oct-200912:48x86
Windows Vista or Windows Server 2008, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dnsapi.dll6.0.6001.22550221,18427-Oct-200913:30x64
Dnscacheugc.exe6.0.6001.2255028,67227-Oct-200911:13x64
Dnsrslvr.dll6.0.6001.22550117,76027-Oct-200913:30x64
Dnsapi.dll6.0.6002.22252221,18427-Oct-200913:02x64
Dnscacheugc.exe6.0.6002.2225228,67227-Oct-200910:50x64
Dnsrslvr.dll6.0.6002.22252117,76027-Oct-200913:02x64
Dnsapi.dll6.0.6001.22550167,42427-Oct-200913:04x86
Dnscacheugc.exe6.0.6001.2255025,08827-Oct-200910:52x86
Dnsapi.dll6.0.6002.22252168,44827-Oct-200912:48x86
Dnscacheugc.exe6.0.6002.2225225,08827-Oct-200910:36x86
Windows Server 2008, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dnsapi.dll6.0.6001.22550429,56827-Oct-200912:55IA-64
Dnscacheugc.exe6.0.6001.2255060,41627-Oct-200910:53IA-64
Dnsrslvr.dll6.0.6001.22550223,23227-Oct-200912:55IA-64
Dnsapi.dll6.0.6002.22252429,56827-Oct-200912:48IA-64
Dnscacheugc.exe6.0.6002.2225260,41627-Oct-200910:46IA-64
Dnsrslvr.dll6.0.6002.22252223,23227-Oct-200912:48IA-64
Dnsapi.dll6.0.6001.22550167,42427-Oct-200913:04x86
Dnscacheugc.exe6.0.6001.2255025,08827-Oct-200910:52x86
Dnsapi.dll6.0.6002.22252168,44827-Oct-200912:48x86
Dnscacheugc.exe6.0.6002.2225225,08827-Oct-200910:36x86


STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Vista

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Package_for_kb975792_client_1~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,36728-Oct-200906:34Not Applicable
Package_for_kb975792_client_2~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,69428-Oct-200906:34Not Applicable
Package_for_kb975792_client~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,71328-Oct-200906:34Not Applicable
Package_for_kb975792_sc_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,42128-Oct-200906:34Not Applicable
Package_for_kb975792_sc_1~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,69028-Oct-200906:34Not Applicable
Package_for_kb975792_sc~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,70128-Oct-200906:34Not Applicable
Package_for_kb975792_server_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,42528-Oct-200906:34Not Applicable
Package_for_kb975792_server_1~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,69428-Oct-200906:34Not Applicable
Package_for_kb975792_server~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,71328-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,42228-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv~31bf3856ad364e35~x86~~6.0.2.0.mumNot Applicable1,43028-Oct-200906:34Not Applicable
X86_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6001.22550_none_e23611a49b9f8386.manifestNot Applicable28,40727-Oct-200914:49Not Applicable
X86_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6002.22252_none_e41e842098c40b58.manifestNot Applicable28,40727-Oct-200914:23Not Applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6001.22550_none_3e54ad2853fcf4bc.manifestNot Applicable28,43527-Oct-200915:16Not Applicable
Amd64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6002.22252_none_403d1fa451217c8e.manifestNot Applicable28,43527-Oct-200914:34Not Applicable
Package_for_kb975792_client_1~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,37528-Oct-200906:34Not Applicable
Package_for_kb975792_client_2~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,70628-Oct-200906:34Not Applicable
Package_for_kb975792_client~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,72328-Oct-200906:34Not Applicable
Package_for_kb975792_sc_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,42928-Oct-200906:34Not Applicable
Package_for_kb975792_sc_1~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,70228-Oct-200906:34Not Applicable
Package_for_kb975792_sc~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,71128-Oct-200906:34Not Applicable
Package_for_kb975792_server_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,43328-Oct-200906:34Not Applicable
Package_for_kb975792_server_1~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,70628-Oct-200906:34Not Applicable
Package_for_kb975792_server~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,72328-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,43028-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv~31bf3856ad364e35~amd64~~6.0.2.0.mumNot Applicable1,43828-Oct-200906:34Not Applicable
Wow64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6001.22550_none_48a9577a885db6b7.manifestNot Applicable27,48227-Oct-200914:42Not Applicable
Wow64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6002.22252_none_4a91c9f685823e89.manifestNot Applicable27,48227-Oct-200914:16Not Applicable
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ia64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6001.22550_none_e237b59a9b9d8c82.manifestNot Applicable28,42127-Oct-200914:20Not Applicable
Ia64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6002.22252_none_e420281698c21454.manifestNot Applicable28,42127-Oct-200914:07Not Applicable
Package_for_kb975792_sc_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,42528-Oct-200906:34Not Applicable
Package_for_kb975792_sc_1~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,53028-Oct-200906:34Not Applicable
Package_for_kb975792_sc~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,70628-Oct-200906:34Not Applicable
Package_for_kb975792_server_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,42928-Oct-200906:34Not Applicable
Package_for_kb975792_server_1~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,53328-Oct-200906:34Not Applicable
Package_for_kb975792_server~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,71828-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,42628-Oct-200906:34Not Applicable
Package_for_kb975792_winpesrv~31bf3856ad364e35~ia64~~6.0.2.0.mumNot Applicable1,43428-Oct-200906:34Not Applicable
Wow64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6001.22550_none_48a9577a885db6b7.manifestNot Applicable27,48227-Oct-200914:42Not Applicable
Wow64_microsoft-windows-dns-client_31bf3856ad364e35_6.0.6002.22252_none_4a91c9f685823e89.manifestNot Applicable27,48227-Oct-200914:16Not Applicable

REFERENCES

For more information about the RFC 1123, click the following non-Microsoft article:

RCF 1123 (http://www.ietf.org/rfc/rfc1123.txt) Requirements for Internet Hosts -- Application and Support

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.

APPLIES TO
  • Windows Vista Service Pack 2, when used with:
    • Windows Vista Business
    • Windows Vista Enterprise
    • Windows Vista Home Basic
    • Windows Vista Home Premium
    • Windows Vista Starter
    • Windows Vista Ultimate
    • Windows Vista Enterprise 64-bit Edition
    • Windows Vista Home Basic 64-bit Edition
    • Windows Vista Home Premium 64-bit Edition
    • Windows Vista Ultimate 64-bit Edition
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
Keywords: 
kbexpertiseinter kbqfe kbhotfixserver kbsurveynew kbautohotfix kbbug kbfix KB975792
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