FIX: ISA Server stops accepting new requests after you configure Web publishing, Web proxy, or Automatic discovery

Consider the following scenario:

• You configure Web publishing, Web proxy, or automatic discovery in Microsoft Internet Security and Acceleration (ISA) Server 2006.
• A client establishes a TCP session with the corresponding listener.
• The client violates the TCP state before any data is sent.

In this scenario, ISA Server stops accepting new requests.

This problem occurs because ISA Server 2006 does not correctly manage TCP states for Web listeners.

To resolve this vulnerability, install the hotfix rollup package that the following Microsoft Knowledge Base article describes:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

The problem only applies when one or more of the following are configured:

• Web publishing
• Web proxy
• Automatic discovery

For more information about this vulnerability, visit the following Microsoft Web sites:For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: