Patent ID: 7669240
Filing Date: 2010-02-23
Classification: H04L

Abstract:
1. A method to detect harmful packets on a computer network, the method including: providing at least one algorithm that scans received packets; identifying packets having a predefined format including a single Source Address (SA), N Destination Addresses (DAs), and M Destination Ports (DPs), wherein N> (greater than) M; wherein the SA, DP, and many DAs are stored in a leaf of a Patricia Tree arrangement, and wherein the Patricia Tree arrangement includes a Direct Table; indexing into a slot of the Direct Table utilizing a hash value of SA and DP of a predefined packet; if the slot has no entry, inserting a pointer in said slot; if the slot contains information pointing to a single leaf: reporting said packets to a central administrative authority, which authority includes functionality for taking decisive actions to limit harmful effects of said packets, wherein the decisive actions include: providing a list of Permissible DPs; comparing a DP in the identified packet with the list of Permissible DPs; and discarding the identified packet having a matching DP.