Article ID: 2620156 - View products that this article applies to.
Consider the following scenario:
In this scenario, you notice that the Active FTP data channel cannot be established. For example, you cannot retrieve directory content when you send the LIST FTP command.
Note This problem does not occur if the client computer uses secure network address translation (SecureNAT) instead of Forefront Threat Management Gateway Client or if Passive FTP is used instead of Active FTP.
To resolve this problem, install the hotfix rollup that is described in the following Microsoft Knowledge Base article:
(http://support.microsoft.com/kb/2616324/ )A hotfix rollup is available for Forefront Threat Management Gateway Client
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Firewall client computers, visit the following Microsoft TechNet website:
About firewall client computersFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates