Patent ID: 8935419
Filing Date: 2015-01-13
Classification: H04L

Abstract:
1. A network system comprising: a client device; a service server device; and a filtering device including a first function of relaying a TCP connection established between the client device and the service server device, and an HTTP request and an HTTP response transmitted and received by using the TCP connection, and a second function of disconnecting an access to an access control object service provided by the service server device from the client device, wherein: the filtering device includes a filtering processing unit which is configured to perform detection processing and disconnect processing; the detection processing is a process for detecting HTTP accesses to the same access control object service provided by the service server device from the same client device through an establishment request of the TCP connection used by the HTTP access; and the disconnect processing is a process in which when an establishment request of the TCP connection used by the HTTP accesses is detected through the detection processing, establishment and disconnect of the TCP connection in which the filtering device is coupled as a termination are performed without transferring an establishment request of the TCP connection to the service server device.