US 6,983,323 B2 | ||
Multi-level packet screening with dynamically selected filtering criteria | ||
Craig Cantrell, Austin, Tex. (US); Marc Willebeek-LeMair, Austin, Tex. (US); Dennis Cox, Austin, Tex. (US); Donovan Kolbly, Austin, Tex. (US); and Brian Smith, Fort Worth, Tex. (US) | ||
Assigned to TippingPoint Technologies, Inc., Austin, Tex. (US) | ||
Filed on Aug. 12, 2002, as Appl. No. 10/217,862. | ||
Prior Publication US 2004/0030776 A1, Feb. 12, 2004 | ||
Int. Cl. G06F 13/00 (2006.01) |
U.S. Cl. 709—225 | 75 Claims |
1. A packet filtering device, comprising:
a first filter applying a first filtering criteria against packet traffic to generate a first pass traffic portion and a fail
traffic portion; and
a second filter, by-passed by the first pass traffic portion, applying a second filtering criteria against the fail traffic
portion to generate a second pass traffic portion and a reject traffic portion;
wherein the first and second filtering criteria are dynamically selected during first and second filter operation to filter
packet traffic.
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