Microsoft KB Archive/895135

= Valid secondary MMSU streaming sessions may be closed by ISA Server 2004 =

Article ID: 895135

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition
 * Microsoft Internet Security and Acceleration Server 2004 Standard Edition

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SYMPTOMS
Microsoft Internet Security and Acceleration (ISA) Server 2004 may close valid secondary Multimedia Server Universal Datagram Protocol (MMSU) streaming sessions.



CAUSE
This problem may occur because of the following scenario. One published network uses the Requests appear to come from the ISA Server computer option as the server publishing rule. Other published networks do not use this option. Secondary outgoing traffic from the networks arrives at the published server from the same IP address and port. Therefore, ISA Server 2004 may disconnect all the networks when you close your connection to one of the networks.



RESOLUTION
To resolve this problem, use one of the following methods:
 * Change the network relationship to Network Address Translation (NAT).
 * Change the server publishing rule so that the traffic appears to come from the clients.

Note For networks where the traffic appears to come from the server, use one IP address in the server publishing. For other networks, use a different IP address for each network.



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

Keywords: kbtshoot kbfirewall kbsecurity kbprb KB895135

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