Network connection apparatus having an intrusion detection function

PURPOSE: A network connecting device having a hacker intrusion detection function is provided to control a new intrusion pattern by deciding the use of an intrusion pattern, to accurately detect the intrusion of a hacker by preventing the loss of a data packet, and to detect the intrusion of the hacker with only a LAN(Local Area Network) card. CONSTITUTION: A LAN card as a network connecting device comprises a media connector(100), a physical layer device(110), a MAC(Media Access Control) unit(120), a protocol and IP(Internet Provider) address identification unit(130), an intrusion pattern comparison unit(140), a process control unit(150), and a PCI(Peripheral Component Interconnect) bus interface unit(160). The media connector connects a LAN card to a transfer medium. The physical layer device converts a high-speed Ethernet data frame transmitted from the media connector to a data frame corresponding to the MMI(Media Independent Interface) form. The MAC controls data transmission and reception in between the physical layer device and the bus interface unit. The intrusion pattern comparison unit compares the databased intrusion patterns with the protocol information of respective packet units.