PPTP or L2TP/IPsec connection is not reestablished between Forefront TMG 2010 servers

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Article ID: 2498835 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You install Microsoft Forefront Threat Management Gateway (TMG) 2010 on two servers.
  • You set up a site-to-site VPN connection between the two servers. For example, you set up a PPTP or a L2TP/IPsec connection.
  • The line for the connection recovers from a disruption.
In this scenario, the PPTP or L2TP/IPsec connection is not reestablished between the two servers.

CAUSE

This issue occurs because the new allocated address is not added to the network when the unicast address of the dial-out adapter is not available.

The network snapshot contains the dial-out adapter in reconnection. The adapter information is from an in-memory snapshot of IPHelper. However, the retrieval of unicast addresses is from IPHelper. Therefore, a reconnection does not occur when the in-memory snapshot does not contain current adapter information.

RESOLUTION

Update information

To resolve this issue, install the software update that is described in the following Microsoft Knowledge Base (KB) article:
2498770 Software Update 1 rollup 3 for Forefront Threat Management Gateway (TMG) 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.

MORE INFORMATION

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

Properties

Article ID: 2498835 - Last Review: February 25, 2011 - Revision: 1.0
APPLIES TO
  • Microsoft Forefront Threat Management Gateway 2010 Enterprise
  • Microsoft Forefront Threat Management Gateway 2010 Standard
Keywords: 
kbqfe kbfix kbsurveynew kbexpertiseinter KB2498835

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