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An update that enables Internet Explorer in Windows XP, in Windows Vista, or in Windows Server 2008 to parse fragmented TLS/SSL handshake messages is available
Article ID: 2541763 - View products that this article applies to.
In certain situations, TLS/SSL handshake messages become too large to be contained in a single packet. In these situations, some third-party implementations of the TLS/SSL protocol fragment the messages before they are sent. However, the Microsoft implementation of the TLS/SSL protocol cannot parse fragmented messages. Therefore, Windows Internet Explorer on a computer that is running Windows XP, Windows Vista, or Windows Server 2008 cannot connect to servers that use a third-party TLS/SSL protocol. Additionally, you receive the following error message when you try to connect to such a server.
The page cannot be displayed.
Update informationThis update enables the Microsoft implementation of the TLS/SSL protocol to successfully parse fragmented messages that are sent by a third-party implementation of the TLS/SSL protocol.
After you install the update, you can use registry keys to configure the maximum size of a fragmented message that the Microsoft implementation of the TLS/SSL protocol can parse. You can also use these registry keys to prevent the Microsoft implementation of the TLS/SSL protocol from processing fragmented messages.
To configure how the Microsoft implementation of the TLS/SSL protocol handles fragmented TLS/SSL messages, create the appropriate registry key for you environment under the following registry subkey:
On a client computer
On a server that does not use client authentication
On a server that uses client authentication
How to obtain this updateThe following files are available for download from the Microsoft Download Center:
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
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119591Microsoft 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.
(http://support.microsoft.com/kb/119591/ )How to obtain Microsoft support files from online services
PrerequisitesTo apply this update, you must be running one of the following operating systems:
322389For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322389/ )How to obtain the latest Windows XP service pack
935791For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/935791/ )How to obtain the latest Windows Vista service pack
(http://support.microsoft.com/kb/968849/ )How to obtain the latest service pack for Windows Server 2008
Registry informationTo use the update in this package, you do not have to make any changes to the registry.
Restart requirementYou may have to restart the computer after you apply this update.
Update replacement informationThis update does not replace a previously released update.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 2541763 - Last Review: July 8, 2011 - Revision: 4.0