In Microsoft Internet Security and Acceleration (ISA) Server 2006 with Service Pack 1 (SP1), you create a URL set.
Some URLs that are included in this URL set contain adjacent IP addresses as the hosts. For example, the URL set contains the following URLs:
You create an access rule for this URL set. For example, the access rule allows a client to access the URL set.
In this scenario, the access rule for this URL set does not work as expected. In the example that is mentioned here, the access rule does not take effect when the client tries to access any of these three URLs.
To resolve this problem, apply the hotfix that is mentioned in the following Microsoft Knowledge Base article:
955605 Description of the ISA Server 2006 hotfix package: July 15, 2008
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, 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