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KB: HTTPS inspection in Forefront Threat Management Gateway 2010 doesn't use the full URL path for URL categorization

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KB7334333232

When HTTPS inspection is enabled, Microsoft Forefront Threat Management Gateway 2010 (TMG 2010) uses only the host part of the URL for URL filtering. For example, consider the following scenario:

- Assume that www.contoso.com belongs in the Education category.

  • - You set a URL category override for www.contoso.com/poker to the Gambling category, and a deny rule exists for that category.

When you browse to http://www.contoso.com/poker in this scenario, TMG blocks this URL because the category is evaluated as Gambling, however when you browse to https://www.contoso.com/poker, the page loads.

This behavior occurs because for HTTPS inspection, TMG passes only the host domain (www.contoso.com) to the categorization service. In the example above, the host domain falls into the Education category.

For additional details please see the following:

KB3041871 - HTTPS inspection in Forefront Threat Management Gateway 2010 doesn't use the full URL path for URL categorization (http://support.microsoft.com/en-us/kb/3041871)

J.C. Hornbeck | Solution Asset PM | Microsoft GBS Management and Security Division

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