Only the First Web Site Is Returned Using Web Publishing for Multiple Sites

Internet Security and Acceleration (ISA) Server may return only the Web site that is specified in the first publishing rule in the Web publishing rules list. This behavior can occur if all of the following conditions exist:

�	You use Web publishing to publish two or more Web sites, each using a different IP address on the external ISA Server interface.
�	None of the external IP addresses have host names associated with them on the DNS server that ISA Server uses for name resolution.
�	The external Web browser sends a request by using any IP address (only the IP address, not the fully qualified domain name [FQDN]) other than the one that is listed first in the Web publishing list.

This is likely to occur in laboratory environments in which it is common to test Web publishing by using only IP addresses, and it is also common to not have host names registered for every IP address in use.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To resolve this problem, obtain the latest service pack for latest ISA Server 2000 service pack. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
Important If the problem is not resolved after you apply the latest ISA Server 2000 service pack, edit the registry:

1.	Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy\Parameters
2.	Add the following value to this registry key: Value name: SkipNameResolutionForPublishingRules Value data: 1 (decimal) Value type: DWORD
3.	Quit Registry Editor.
4.	Stop the W3proxy service, and then restart the service.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft ISA Server 2000 Service Pack 1.

This behavior has been reported to occur if you use "stacked" DNS Alias records. In this case, requests for each host will be based on WPR ordering even if the ISA Server computer is up-to-date on the hotfixes. For example (these actual entries in "hosterboys.com" zone):