US PATENT DOCUMENTS 5,343,471 A 8/1994 Cassagnol................... 370/401 5.426, 378 A
6/1995 Ong............................ 326/39 5.426, 379 A* 6/1995 Trimberger.................. 326/39 …

US8265060B2 - Packet data filtering - Google Patents US8265060B2 - Packet data filtering -
Google Patents Packet data filtering Download PDF Info Publication number US8265060B2 …

This invention pertains to packet filtering. More Specifically, it relates to a use of Small,
optimized Sequences of binary 5-tuples representing filter rules to achieve Space efficient …

Fleischner St., Portland, OR (US) 97229 2002/0163909 A1 11/2002 Sarkinen et al.(*) Notice:
Subject to any disclaimer, the term of this 2003/0167390 A1* 9, 2003 Gorman et al …

USPC....................... 370/255,370/395.21: 370/465 transmitting commands. The present
invention may be imple (58) Field of Classification Search mented without requiring CPU …

BACKGROUND Data packet systems of various kinds are known in the art. Such systems
generally serve to source and/or receive, pro cess, and/or route data packets. Many Such …

3 They are not intended as an exhaustive description of the invention or as a limitation on
the scope of the invention. In addition, an illustrated embodiment needs not have all the …

(57) ABSTRACT A packet data filter which Stores ordered rules and Sequen tially applies
the rules to received data packets to determine the disposition of the data packet. The packet …

This application is a continuation-in-part of co-pending parent US patent application Ser. No.
10/403,946 by inven tors Aerrabotu et al., filed on Mar. 31, 2003. The related application is …

Each application executing on an application server uses an extended version of the
Berkeley Packet Filter (BPF) lan guage to define an application-specific rule set. The appli …