Microsoft KB Archive/187738

= Upgrade to IIS 4.0 May Give Extra Virtual Directories =

Article ID: 187738

Article Last Modified on 6/23/2005

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APPLIES TO


 * Microsoft Internet Information Server 4.0

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This article was previously published under Q187738



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SUMMARY
After an upgrade from Internet Information Server (IIS) 1.0, 2.0, or 3.0 on a computer with multiple virtual servers, you may find that you have extra virtual directories under each server that were not defined under the previous version.



MORE INFORMATION
Under IIS 1.0, 2.0, and 3.0, a virtual directory could be defined without an IP address. This virtual directory was considered "global" for all servers on that computer. Under IIS 4.0, this is no longer the case, and all virtual directories must be explicitly defined for each Web server.

During the upgrade process, if the Setup program notices that the server has a "global" virtual directory, Setup adds the virtual directory to each of the Web sites on the computer, because there is no way to determine which server the original virtual directory was defined for.

Keywords: kbinfo KB187738

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