The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2001
Filed:
Nov. 29, 2000
Edward B. Boden, Vestal, NY (US);
Wesley A. Brzozowski, Endicott, NY (US);
Paul A. Gebler, Jr., Vestal, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Small, optimized sequences of binary 6-tuples representing filter rules achieve very fast IP packet filtering. Filtering IP packets received from a caller at the physical interface to an operating system kernel is accomplished by processing FILTER rule statements entered by a user in a rules file to generate 6-tuple filtering rules, each of the 6-tuple filtering rules including an operator index; resolving relative and symbolic indexes in these 6-tuples filtering rules to form resolved filtering rules and loading the resolved filtering rules to the operating system kernel; and interpreting the resolved filtering rules for each IP packet received at the physical interface.