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ISA Server 2006 incorrectly returns an "HTTP 304 Not Modified" response to a proxy client

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Symptoms

Microsoft Internet Security and Acceleration (ISA) Server 2006 may incorrectly return an "HTTP 304 Not Modified" response to a proxy client. For example, ISA Server 2006 may return an "HTTP 304 Not Modified" response to a proxy client when the content is changed or is expired.

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Cause

This problem can occur if the client browser sends a request that includes the "If-Modified-Since" header field.

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Resolution

To resolve this problem, obtain and install the hotfix that is described in the following article in the Microsoft Knowledge Base:
951510� Description of the ISA Server 2006 hotfix package: April 9, 2008

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Status

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

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Keywords: KB950534, kbqfe, kbpubtypekc, kbsurveynew, kbprb

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Article Info
Article ID : 950534
Revision : 1
Created on : 4/7/2009
Published on : 4/7/2009
Exists online : False
Views : 337