| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a connection prevention system for applying access restriction to a network even to a client terminal to which a security policy whose urgency is low has not been applied. <P>SOLUTION: A client terminal transmits an existence notification packet via a network to an illegal connection detection device, and counts an elapsed time after the reception of a security policy from the illegal connection detection device, and compares the elapsed time with an access restriction application time, and when the elapsed time does not exceed the access restriction application time, continues communication, and when the elapsed time exceeds the access restriction application time, transmits security non-application notification to the illegal connection detection device. When receiving the existence notification packet from the client terminal, the illegal connection detection device transmits the security policy to the client terminal, and when receiving the security non-application notification from the client terminal, restricts the access of the client terminal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
