| 摘要 |
PURPOSE: A method for blocking session of transmission control protocol for an unauthenticated device is provided to block a TCP communication of the unauthenticated device which already entered the network through an IP address setting, thereby establishing the improved security environment. CONSTITUTION: If a destination MAC(Medium Access Control) address of a captured packet is same as MAC address of an unauthenticated device, it is determined whether the captured packet is a TCP(Tape Carrier Package) packet or not(S12). If the destination MAC address is not the same as the MAC address of an unauthenticated device, the destination MAC address of the captures packet is compared with the MAC address of the unauthenticated device(S14). If the captured packet is the TCP packet, information is obtained from a packet(S16). The session interception of an authenticated device is performed(S17).
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