Microsoft KB Archive/894485

= You cannot access an ISA Server 2004 Web site through a hardware balancer that is configured to use local triangulation =

Article ID: 894485

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition
 * Microsoft Internet Security and Acceleration Server 2004 Standard Edition

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SYMPTOMS
You cannot access a Web site that was published by using Microsoft Internet Security and Acceleration (ISA) Server 2004 Web publishing rules. You are trying to access the ISA Server 2004 Web site through a hardware balancer that is configured to use local triangulation.



CAUSE
This problem occurs because the security check in ISA Server 2004 prevents the packets from reaching the Web listener. ISA Server 2004 blocks and drops the packets as they arrive on the wrong interface.



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 this article describes. Apply this hotfix only to systems that are experiencing this specific problem.

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
For ISA Server 2004, Standard Edition, you must install ISA Server 2004 Service Pack 1. For more information about how to obtain the latest ISA Server 2004 service pack, 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

There are no prerequisites for ISA Server 2004, Enterprise Edition.

Restart requirement
You must restart the computer after you apply this 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.

ISA Server 2004, Standard Edition Date         Time   Version        Size     File name -- 01-Apr-2005  14:49  4.0.2163.253   340,240  Fweng.sys ISA Server 2004, Enterprise Edition Date         Time   Version        Size     File name -- 07-Apr-2005  16:10  4.0.3440.253   361,112  Fweng.sys



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 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 2004 hotfixes and updates

For more information about the terms that are used in this article, click the following article number to view the article in the Microsoft Knowledge Base:

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

Additional query words: NLB load balancing

Keywords: kbfix kbqfe kbsecurity kbhotfixserver KB894485

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