Understanding Firewall Policy Rule Processing
To know how to create a firewall policy that works as expected, you need to understand how firewall policy rules are processed. This section provides information about how Forefront TMG evaluates and allows traffic to flow between networks.
When a request arrives, Forefront TMG does the following:
Checks network rules to verify that a network relationship exists between the source and destination of the request. The only exception is for traffic handled by the Web proxy filter. Network rules do not affect this traffic. (The Web proxy filter is the component of Forefront TMG that receives requests from Web proxy clients.) The predefined HTTP protocol is bound to this filter, and network rules are not ...
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