Symptoms
Consider the following scenario:
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You install Microsoft Forefront Threat Management Gateway (TMG) 2010 on a computer.
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You use Forefront TMG 2010 to publish an internal point-to-point tunneling protocol (PPTP) server.
In this scenario, the computer may restart unexpectedly. Additionally, you receive the following Stop code error:
Stop code 000000D1
Cause
This issue occurs because a Generic Routing Encapsulation (GRE) packet is handled by Forefront TMG 2010 incorrectly.
Resolution
Service pack information
This issue is resolved in Forefront TMG 2010 Service Pack 1 (SP1).
For more information about how to obtain Forefront TMG 2010 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
981324 List of problems that are fixed in Forefront Threat Management Gateway 2010 Service Pack 1
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
