Article ID: 190009 - Last Review: June 22, 2005 - Revision: 5.2

Client Cert. Mapping Only Works w/First Page on Proxy Connection

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This article was previously published under Q190009
We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:
http://www.microsoft.com/technet/security/prodtech/IIS.mspx (http://www.microsoft.com/technet/security/prodtech/IIS.mspx)
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SYMPTOMS

Over a proxy, after the initial certificate mapping has occurred, subsequent attempts to map the certificate during the same connection cause an error message of type 401.
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CAUSE

When going through a proxy, although Internet Information Server (IIS) does reset the authentication after each request, it does not also retry Mapping the next request.
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RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
152734  (http://support.microsoft.com/kb/152734/EN-US/ ) How to Obtain the Latest Windows NT 4.0 Service Pack

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STATUS

Microsoft has confirmed this to be a problem in Internet Information Server version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
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APPLIES TO
  • Microsoft Windows NT Server 4.0, Terminal Server Edition
  • Microsoft Internet Information Server 4.0
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Keywords: 
kbbug kbfix KB190009
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