Microsoft KB Archive/824069

= Wireless and VPN Clients Cannot Successfully Authenticate by Using EAP-TLS Authentication =

Article ID: 824069

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)

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SYMPTOMS
Wireless and virtual private network (VPN) clients may not be able to successfully authenticate by using Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) authentication through a Microsoft Internet Authentication Service (IAS) installation on a Microsoft Windows Server 2003-based server.



CAUSE
This problem may occur if IAS picks a certificate that is not valid for network access authentication -- for example, a certificate that contains a blank subject name. The selection of the certificate that is not valid causes TLS negotiations to fail both for VPN and for wireless connections.



Hotfix Information
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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     Platform --  08-Aug-2003  19:32  5.2.3790.75   158,208   Rastls.dll    i386 08-Aug-2003 19:33  5.2.3790.75   353,280   Rastls.dll    IA-64 08-Aug-2003 19:32  5.2.3790.75   158,208   Wrastls.dll   IA-64



WORKAROUND
On your server (or servers) that has IAS installed, open the remote access policies that use EAP, and then manually select the correct certificate.



STATUS
Microsoft has confirmed that this is a problem in Windows Server 2003.

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe kbwinserv2003presp1fix KB824069

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