Packet filter policy verification system
US7039053B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Nov 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for determining the validity of an n-dimensional policy table in a router. The router may include a processor, a memory (e.g. ROM, flash memory, non-volatile memory, hard disk, etc.), and two or more policy rules stored in the memory. Each policy rule may have one or more dimensions (or parameters), designated generally by the symbol n. In accord with the method, the processor may make a determination whether any particular policy rule in the table intersects any subsequent policy rule in the table in every dimension n. If no rules in the table intersect in every dimension n, then the policy table is valid, and the router may operate normally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.