You cannot access an ISA Server 2004 Web site through a hardware balancer that is configured to use local triangulation (894485)


The information in this article applies to:

  • Microsoft Internet Security and Acceleration Server 2004, Enterprise Edition
  • Microsoft Internet Security and Acceleration Server 2004, Standard Edition

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.

RESOLUTION

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, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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 "Applies to" 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

Modification Type:MinorLast Reviewed:10/12/2006
Keywords:kbSecurity kbQFE kbfix kbHotfixServer KB894485 kbAudITPRO
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