Article ID: 950150 - View products that this article applies to.
You download a file that has a .gz file name extension through a Microsoft Internet Security and Acceleration (ISA) 2004 or ISA Server 2006 Web proxy server. When you open the .gz file, you receive an error message that resembles the following:
Note This problem occurs if the response from the Web server contains a content-type header that has the value APPLICATION/G-ZIP.
Invalid archive directory.
This problem occurs because ISA Server 2004 and ISA Server 2006 decompress the .gz file before it is downloaded to the computer. This issue occurs if HTTP compression is enabled in ISA Server 2004.
Note By default, ISA Server 2004 and ISA Server 2006 do not send the Accept-Encoding HTTP header to the Web server. They send the Accept-Encoding HTTP header only when you enable HTTP compression.
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To resolve this problem, follow these steps:
Hotfix installation information
PrerequisitesFor ISA Server 2004, the computer must be running ISA Server 2004 Service Pack 3 (SP3). For more information about ISA Server 2004 SP3, click the following article number to view the article in the Microsoft Knowledge Base:
891024For ISA Server 2006, the latest service pack must be installed. For more information about how to obtain the latest service pack, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/891024/ )How to obtain the latest ISA Server 2004 Service Pack
(http://support.microsoft.com/kb/954258/ )How to obtain the latest Internet Security and Acceleration (ISA) Server 2006 Service Pack
Restart requirementISA services are automatically restarted after you install the ISA Server 2004 hotfix or the ISA Server 2006 service pack.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
For more information about how to install ISA Server hotfixes and updates, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/885957/ )How to install ISA Server hotfixes and updates
Article ID: 950150 - Last Review: September 29, 2008 - Revision: 2.0