NAT functionality fails on a Windows Server 2012-based RRAS server

Symptoms
Network address translation (NAT) functionality is broken in the following scenario:
  • You have a Routing and Remote Access service (RRAS) server that has NAT configured.
  • You change the TCP or UDP mapping time-out value.
  • You restart the remote access service or the computer.
Resolution
To fix this issue, we have released a hotfix. Even though this issue is observed only in Windows Server 2012, the hotfix also applies to Windows 8.

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.

Hotfix information

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: Note 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

There's no prerequisite to apply this hotfix.

Registry information

To apply this hotfix, 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.
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.
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.

Windows 8 and Windows Server 2012

Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8/Windows Server 2012" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • 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
    6.2.920 0.21 xxxWindows 8 and Windows Server 2012RTMLDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately 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 aren't listed, are signed with a Microsoft digital signature.
x64 Windows 8 and Windows Server 2012
File nameFile versionFile sizeDateTimePlatform
Ipnat.sys6.2.9200.21615145,92004-Sep-201513:21x64
Ipmontr.dll6.2.9200.21615217,08807-Sep-201514:23x64
x86 Windows 8
File nameFile versionFile sizeDateTimePlatform
Ipnat.sys6.2.9200.21615126,97604-Sep-201519:07x86
Ipmontr.dll6.2.9200.21615184,83204-Sep-201518:28x86

Additional file information

x64 Windows 8 and Windows Server 2012
File propertyValue
File nameAmd64_785d60ca038624f93fdbad360e92ade6_31bf3856ad364e35_6.2.9200.21616_none_0fda5f316f80d321.manifest
File versionNot applicable
File size702
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
File nameAmd64_bc05d384ac495d309e70d9dfd2a8d2d0_31bf3856ad364e35_6.2.9200.21616_none_19cdeb30ea9bb173.manifest
File versionNot applicable
File size697
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
File nameAmd64_microsoft-windows-ipnat_31bf3856ad364e35_6.2.9200.21616_none_b4b8f8d41e0334ef.manifest
File versionNot applicable
File size4,821
Date (UTC)07-Sep-2015
Time (UTC)16:58
PlatformNot applicable
File nameAmd64_microsoft-windows-rasipmontr_31bf3856ad364e35_6.2.9200.21616_none_7fd7ef384f8dc52a.manifest
File versionNot applicable
File size3,402
Date (UTC)07-Sep-2015
Time (UTC)16:58
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,707
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
x86 Windows 8
File propertyValue
File nameUpdate.mum
File versionNot applicable
File size1,997
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
File nameX86_9a0397bbe93e42a8b91d9d2f3be84587_31bf3856ad364e35_6.2.9200.21616_none_5c55fcd77363f1a9.manifest
File versionNot applicable
File size693
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
File nameX86_ae44108326fffa9ae443c02bd8c08ee2_31bf3856ad364e35_6.2.9200.21616_none_db6803d575c9e531.manifest
File versionNot applicable
File size698
Date (UTC)07-Sep-2015
Time (UTC)20:09
PlatformNot applicable
File nameX86_microsoft-windows-ipnat_31bf3856ad364e35_6.2.9200.21616_none_589a5d5065a5c3b9.manifest
File versionNot applicable
File size4,817
Date (UTC)07-Sep-2015
Time (UTC)15:51
PlatformNot applicable
File nameX86_microsoft-windows-rasipmontr_31bf3856ad364e35_6.2.9200.21616_none_23b953b4973053f4.manifest
File versionNot applicable
File size3,398
Date (UTC)07-Sep-2015
Time (UTC)15:51
PlatformNot applicable
Properties

Article ID: 3091417 - Last Review: 11/04/2015 08:16:00 - Revision: 2.0

Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8

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