Microsoft KB Archive/821734

= FIX: A courtesy redirect may return the ACv1VSite# host name instead of the cluster name =

Article ID: 821734

Article Last Modified on 4/7/2006

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APPLIES TO


 * Microsoft Application Center 2000 Standard Edition

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SYMPTOMS
A client that accesses a Microsoft Application Center 2000 cluster may receive ACv1VSite# as the host name returned, instead of receiving the cluster host name. This behavior may cause the client to return the following error message for later requests because ACv1VSite# is not a known host on the client side:

&quot;Server not found&quot;

Note This behavior does not occur on Windows Server 2003-based servers that run Application Center 2000 Service Pack 2. For more information, see the &quot;More Information&quot; section.



CAUSE
This problem occurs because the Application Center 2000 request forwarder (RF) does not correctly handle a forwarded 302 HTTP_STATUS_REDIRECT response for a courtesy redirect. The cluster name is passed to the client. The expected behavior is that the backend host header ACv1VSite# is passed to the client.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.The English version of this hotfix has the file attributes (or later) 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.   Date         Time    Version     Size     File name 20-Oct-2003 23:29  1.0.781.1    168,960  Rffilext.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.



MORE INFORMATION
Because Internet Information Services (IIS) version 6 handles courtesy redirects in a different manner than IIS version 5 handles courtesy redirects, you do not need to install this hotfix on Application Center 2000 clusters that run on Microsoft Windows Server 2003.

On the load-balanced network interface, the courtesy redirect returns the wrong host header, as described in the following:
 * The client request is http://clustername/vdir.
 * The server response is 302 HTTP_STATUS_REDIRECT. The location header is http://ACv1VSite1/vdir/.

You expect the correct response of 301 HTTP_STATUS_MOVED and a location header of http://clustername/vdir/.

Additional query words: ACv1VSite rffiltext rffiltext.dll

Keywords: kbbug kbfix kbqfe kbhotfixserver KB821734

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