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Effective policies and policy enforcement using characterization of flow content and content-independent flow information

  • US 20070088845A1
  • Filed: 09/19/2006
  • Published: 04/19/2007
  • Est. Priority Date: 09/19/2005
  • Status: Active Grant
First Claim
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1. A machine-implemented method comprising:

  • a) obtaining network packets;

    b) grouping the collected network packets into a plurality of flows;

    c) for each of the plurality of flows, i) determining a content characteristic by characterizing content of the flow using bit-stream level statistics, and ii) determining at least one of (A) content-independent flow characteristics, (B) port-independent flow characteristics, and (C) application header-independent flow characteristics; and

    d) enforcing a policy on at least one of the flows using both (1) the determined content characteristic and the (2) determined at least one of (A) content-independent flow characteristics, (B) port-independent flow characteristics, and (C) application header-independent flow characteristics.

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