The VPN disconnects in Windows Server 2008 R2 if NAP and the fast reconnect feature are enabled

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Article ID: 981864 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You install the Network Policy and Access Services server role on a computer that is running Windows Server 2008 R2.
  • You enable the Network Access Protection (NAP) feature on the computer.
  • You enable the fast reconnect feature on the computer.
  • You connect to the computer from a client by using a virtual private network (VPN) connection together with a smart card.
  • The client sends a reauthentication request to the computer.

    Note A reauthentication request is sent when a client is quarantined.
In this scenario, the VPN connection is disconnected.

CAUSE

This issue occurs because the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) authentication does not export an attribute when the fast reconnect feature is enabled. This attribute is required by a NAP policy on the Network Policy Server (NPS). Therefore, this behavior causes the connection to fail.

RESOLUTION

Hotfix information

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 the problem described in this article. 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
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, your computer must be running Windows Server 2008 R2. Additionally, the computer must have the Network Policy and Access Services server role installed.

Registry information

To use the hotfix in this package, you do not 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 does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MANIFEST files and the associated security catalog (.cat) files, are extremely 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.
For all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Rastls.dll6.1.7600.20674423,93620-Mar-201007:57x64
Rastls.dll6.1.7600.20674372,22420-Mar-201007:41x86

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 the architecture of a NAP client and NAP, visit the following Microsoft Web sites:
General information about the architecture of a NAP client

General information about NAP
For more information about the fast reconnect feature, visit the following Microsoft Web site:
General information about the fast reconnect feature
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_31c315b3a0c953827766418505e0673e_31bf3856ad364e35_6.1.7600.20674_none_bef277cac592b321.manifest
File versionNot applicable
File size1,036
Date (UTC)20-Mar-2010
Time (UTC)12:46
File nameAmd64_f6cd22feb2e390e698ef6ca8615c6633_31bf3856ad364e35_6.1.7600.20674_none_081bb1dad96c74fd.manifest
File versionNot applicable
File size698
Date (UTC)20-Mar-2010
Time (UTC)12:46
File nameAmd64_microsoft-windows-rastls_31bf3856ad364e35_6.1.7600.20674_none_c8ed8dce82eb4bc4.manifest
File versionNot applicable
File size4,745
Date (UTC)20-Mar-2010
Time (UTC)09:29
File nameUpdate.mum
File versionNot applicable
File size1,684
Date (UTC)20-Mar-2010
Time (UTC)12:46
File nameX86_microsoft-windows-rastls_31bf3856ad364e35_6.1.7600.20674_none_6ccef24aca8dda8e.manifest
File versionNot applicable
File size4,741
Date (UTC)20-Mar-2010
Time (UTC)08:23

Properties

Article ID: 981864 - Last Review: April 26, 2010 - Revision: 1.0
APPLIES TO
  • Windows HPC Server 2008 R2
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
Keywords: 
kbexpertiseinter kbfix kbhotfixserver kbqfe kbautohotfix kbsurveynew kbprb KB981864

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