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

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.

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:

Hotfix Information

A supported hotfix is 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.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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: 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 EditionISA Server 2004, Enterprise Edition

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.

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: 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: