Description of the update that implements Extended Protection for Authentication in the HTTP Protocol Stack (http.sys)

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows.
INTRODUCTION
This article describes a non-security update which implements Extended Protection for Authentication in the HTTP Protocol Stack (http.sys).

When Extended Protection for Authentication is enabled, authentication requests are bound to both the Service Principal Names (SPN) of the server, the client tries to connect to and to the outer Transport Layer Security (TLS) channel over which the Integrated Windows Authentication authentication occurs.

To use the features that this update includes, you must have the update 968389 installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
968389 Extended Protection for Authentication
More information
For more information about the Extended Protection for Authentication feature, and how to enable this feature upon installing this update, visit the following Microsoft Web site: For more information about the HTTP Protocol Stack, visit the following Microsoft Web site:

How to obtain this update

The following files are available for download from the MicrosoftDownload Center:
All supported x86-based versions of Windows XP
DownloadDownload the WindowsXP-KB970430-x86-ENU package now.
All supported x86-based versions of Windows Server 2003
DownloadDownload the WindowsServer2003-KB970430-x86-ENU package now.
All supported x64-based versions of Windows Server 2003 and of Windows XP Professional x64 Edition
DownloadDownload the WindowsServer2003.WindowsXP-KB970430-x64-ENU package now.
All supported IA-64-based versions of Windows Server 2003
DownloadDownload the WindowsServer2003-KB970430-ia64-ENU package now.
All supported x86-based versions of Windows Server 2008
DownloadDownload the Windows6.0-KB970430-x86 package now.
All supported x64-based versions of Windows Server 2008
DownloadDownload the Windows6.0-KB970430-x64 package now.
All supported IA-64-based versions of Windows Server 2008
DownloadDownload the Windows6.0-KB970430-ia64 package now.
All supported x86-based versions of Windows Vista
DownloadDownload the Windows6.0-KB970430-x86 package now.
All supported x64-based versions of Windows Vista
DownloadDownload the Windows6.0-KB970430-x64 package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

File information

For a list of the files that are provided in this update, download the file information for this update 970430.
Properties

Article ID: 970430 - Last Review: 11/18/2016 09:05:00 - Revision: 2.0

Microsoft Windows Server 2003 Service Pack 2, Microsoft Windows XP Service Pack 3, Microsoft Windows XP Service Pack 2, Windows Server 2008 Service Pack 2, Windows Server 2008 Datacenter without Hyper-V, Windows Server 2008 Enterprise without Hyper-V, Windows Server 2008 for Itanium-Based Systems, Windows Server 2008 Standard without Hyper-V, Windows Server 2008 Datacenter, Windows Server 2008 Enterprise, Windows Server 2008 Standard, Windows Web Server 2008, Windows Vista Service Pack 2, Windows Vista Service Pack 1, Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate 64-bit Edition, Windows Vista Business 64-bit Edition, Windows Vista Business, Windows Vista Enterprise, Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Starter, Windows Vista Ultimate

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