Microsoft KB Archive/936905

= Internet Security and Acceleration (ISA) Server does not log an IP packet that consists of only an IP header =

Article ID: 936905

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2006 Standard Edition
 * Microsoft Internet Security and Acceleration Server 2006 Enterprise Edition
 * Microsoft Internet Security and Acceleration Server 2004 Standard Edition
 * Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition
 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition

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SYMPTOMS
When Microsoft Windows Server 2003 receives an IP packet that consists of only an IP header, Windows Server 2003 drops the packet without forwarding it to Microsoft Internet Security and Acceleration (ISA) Server. You expect ISA Server to receive the packet, to drop the packet, and then to log the dropped packet in compliance with the configured log settings.



CAUSE
This issue occurs because Windows Server 2003 drops any packet that contains only an IP header. Additionally, ISA Server does not receive notification of the packet from the TCP/IP (Tcpip.sys) Windows stack. Because ISA Server does not receive the packet, ISA Server does not log anything in this situation.

Keywords: kbtshoot kbnofix kbexpertiseadvanced kbprb KB936905

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