| 摘要 |
PURPOSE: A method for disconnecting a site connection is provided to transmit a signal that a network checking monitor informs a connection end to a user when a user accesses a harmful site, so that it is possible to prevent a user from connecting to a harmful site. CONSTITUTION: When a computer "A" which monitors a LAN detects a certain LAN which is judged to be disconnected and recognizes that a computer "B" tries to communicate with a computer "C" which includes a harmful information, the computer "A" generates a fake packet and transmits to the computer B. The fake packet forms a receiving side address for the computer "B" and forms a transmission side address for the computer "C" and displays "the communication is disconnected". Namely, the computer "A" fakes itself as the computer "C" and forms a packet for the disconnection. The computer "B" receives the fake packet transmitted from the computer "A". At this time, since the computer "B" is not capable of recognizing the fake packet as a normal packet from the computer "C", the computer "B" judges that the computer "C" wants to disconnect.
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