Packet filtering for data networks
US5473607A · kind A · utility
356Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1993 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Aug 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4625
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved partial packet filter (10) for filtering data packets (210) in a computer network (12) wherein a candidate field (413) of the data packet (210) is hashed to a plurality of bit-wise subsets (636) each being an independent representation of the candidate field (413). Each of the bit-wise subsets (636) is compared to a reference hash table (644) which has been prepared in a preliminary operation series (514). The preliminary operation series (512) configures a plurality of target fields (714) to set selected memory locations (312) in the reference hash table (644).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.