Packet filtering for data networks

Details Packet filtering for data networks Packet filtering for data networks

1993-08-09

1995-12-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, 370 92, H04L 1228

Patent

active

054736072

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).

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