Patent ID: 8037520
Filing Date: 2011-10-11
Classification: H04L

Abstract:
1. A method of providing communications network security, the method comprising the steps of: providing computerized communication systems comprising: configuring the content checker to receive data from the upper interface to the receiver and to forward said data to the upper interface of the protocol stack responsive to content checks applied to said data; configuring the receiver to forward to the content checker only data received from the operating system which is contained in network layer protocol transmission units each consisting of a protocol frame, cell, or packet which is invalid with respect to the protocol stack; sending to the filter the series of one or more a network layer protocol transmission units, the network layer protocol transmission units being deliberately malformed according to the predetermined rule; configuring the filter to forward to the operating system only network layer protocol transmission units which are invalid with respect to the protocol stack; and receiving at the filter a series of one or more network layer protocol transmission units; forwarding from the filter only network layer protocol transmission units which are invalid with respect to the definition of the protocol.