Patent ID: 7818786
Filing Date: 2010-10-19
Classification: H04L

Abstract:
1. A microprocessor based apparatus for managing a session state in the process of transmission control protocol (TCP) handshaking, the apparatus comprising: a session index unit producing and managing an index including 5-tuple information of a session corresponding to an input packet; a detailed information manager generating and managing an entry by extracting state information of a session in which a predetermined time does not elapse after the session has been completely established, to respond to an intrusion detection against the input packet when the index is produced, a brief information manager generating and managing an entry including state information, which includes states of session connection and disconnection and directionality of the input packet, of a session in which a predetermined time elapses after the session has been completely established; and a search unit searching an index of the session corresponding to the input packet in the session index unit, and, if an index does not exist, searching the brief information manager after the session has been completely established.