Packet filtering by applying filter rules to a packet bytestream
US7843915B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Feb 3, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/161
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A packet filtering method, system and article of manufacture are provided which include: employing an instruction set associated with a pseudo-machine in filtering packets received at a network interface card coupled to a host, wherein a set of instructions of the instruction set implements at least one byte-defined filter rule; and the employing includes for a packet of the received packets, processing bytes of the packet as a bytestream and applying at least one filter rule to the bytestream to filter the packet. The applying can be performed in any one of a plurality of locations without customization of the instruction set, including the network interface card and the host processor coupled thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.