Microsoft KB Archive/908501

= Web proxy clients cannot access some Web sites through ISA Server 2004 =

Article ID: 908501

Article Last Modified on 6/14/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2004 Standard Edition

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SYMPTOMS
Web proxy clients cannot access some Web sites through Microsoft Internet Security and Acceleration (ISA) Server 2004.



CAUSE
This problem occurs when all the following conditions are true:
 * A Deny rule is configured in ISA Server 2004 to apply to some content type and to all users.
 * An Allow rule that has a lower priority than the Deny rule is configured to apply to some user groups.
 * The ISA Server 2004 cache is enabled.
 * You try to access an external site that is cached on the ISA Server 2004 computer.

In this scenario, ISA Server 2004 resets the connection during authentication.



Service pack information
To resolve this problem, obtain the latest service pack for Internet Security and Acceleration Server 2004. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

891024 How to obtain the latest ISA Server 2004 service pack

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

Prerequisites
No prerequisites are required.

Restart requirement
You do not have to restart the computer after you apply the hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) 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.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Internet Security and Acceleration Server 2004 Service Pack 2.



MORE INFORMATION
For more information about the terms that are used to describe software updates, click the following article numbers to view the articles in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

817903 New naming schema for Exchange Server software update packages

For more information about how to install ISA Server 2004 hotfixes and updates, click the following article number to view the article in the Microsoft Knowledge Base:

885957 How to install ISA Server hotfixes and updates

Keywords: kbqfe kbfix kbbug kbpubtypekc kbhotfixserver KB908501

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