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This article describes an issue that occurs when Linux DNS client sends IPv4 and IPv6 queries to Windows Server 2012 R2 at the same time. A hotfix is available to fix this issue. Before you install this hotfix, see the Prerequisites section.

Symptoms

This issue occurs when the Linux DNS client virtual machines are running on Azure. The recursive resolver order of the DNS queries is non-deterministic. If the IPv6 query is processed first and the IPv6 record doesn't exist, the Windows Server 2012-based DNS server may respond with a negative answer instead of an empty successful response. Therefore, the Linux DNS client may fail the query. 

Note The issue only occurs when the extension mechanisms for DNS (EDNS) are enabled.

Hotfix information

Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.


A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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 website:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you don't see your language, it's because a hotfix isn't available for that language.

Prerequisites

To apply this hotfix, install update 2919355 in Windows Server 2012 R2.

Registry information

To use the hotfix in this package, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix doesn't replace a previously released hotfix.

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.18 xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

x64 Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Cache.dns

Not applicable

3,198

18-Jun-2013

14:43

Not applicable

Dns.exe

6.3.9600.18045

1,735,168

02-Sep-2015

01:40

x64

Dnsserver.events.xml

Not applicable

609

18-Jun-2013

14:43

Not applicable


x64 Windows Server 2012 R2

File property

Value

File name

Amd64_10b0047e2f018f99e99abe374633c8bb_31bf3856ad364e35_6.3.9600.18045_none_3d3ecbc33fbfc3db.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_16b0499c6e7e0bfcc206259e77db7ee0_31bf3856ad364e35_6.3.9600.18045_none_6df9e0b8780c83e2.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_39e546fe993e60ab6a12912df23b1743_31bf3856ad364e35_6.3.9600.18045_none_332dddb0b36ef0f3.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_45abcf0f5a21eb2c7b925bcdc30c3fc8_31bf3856ad364e35_6.3.9600.18045_none_4edc2c129b5d42b0.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_4f6948523b5f88e7b4d8c87a397d5f56_31bf3856ad364e35_6.3.9600.18045_none_95afb939b8881f75.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_769720317c1dd2469112f18e761cf10f_31bf3856ad364e35_6.3.9600.18045_none_a5bda358e5f890f6.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_7e00884743dbced4060f014c6a49445f_31bf3856ad364e35_6.3.9600.18045_none_0004a7e0ecdbbf26.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_88c7ddb4ac2484dfe4343909b3f1a316_31bf3856ad364e35_6.3.9600.18045_none_ef98687f49436e99.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_9441ea6b4b5e007a903db4ff08b93176_31bf3856ad364e35_6.3.9600.18045_none_dad9b1d9411f80d3.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_a643b4061d478a5ce2b5564598c43b42_31bf3856ad364e35_6.3.9600.18045_none_e740bbf06c390893.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_d4248459c439a7c59372201661e171a7_31bf3856ad364e35_6.3.9600.18045_none_04544b3544dfd1bd.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_e71e9d471f01831230e19315f355790b_31bf3856ad364e35_6.3.9600.18045_none_2e4ea2fcea606441.manifest

File version

Not applicable

File size

710

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_f051b5377784c5ef21538af72c0cf950_31bf3856ad364e35_6.3.9600.18045_none_a22e3f50a025c596.manifest

File version

Not applicable

File size

718

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_de-de_a40382dc4f32ec53.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_en-us_4cf458d53e10f818.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_es-es_4cbfb5b93e37e9bd.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_fr-fr_ef772bb8310a001f.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_it-it_d99f21ff083be59d.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_ja-jp_7bc4a10bfb56f778.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_ko-kr_1f2e7dc0edc7be8e.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_pt-br_4e908f59aac4f5b7.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_ru-ru_961570898f15f3bf.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_zh-cn_ac7ac3432532d22a.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_zh-hk_ab25bbd1260e44ba.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-d..r-service.resources_31bf3856ad364e35_6.3.9600.18045_zh-tw_b077009922a3ae9a.manifest

File version

Not applicable

File size

2,476

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable

File name

Amd64_microsoft-windows-dns-server-service_31bf3856ad364e35_6.3.9600.18045_none_3ef05238aa6a84df.manifest

File version

Not applicable

File size

287,181

Date (UTC)

02-Sep-2015

Time (UTC)

04:20

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

16,897

Date (UTC)

02-Sep-2015

Time (UTC)

10:56

Platform

Not applicable


Status

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

References

See the terminology that Microsoft uses to describe software updates.

More Information

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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