US Patent 11652801 Network access control system and method therefor

A network access control system and a method are disclosed. In a step of generating a transmission control protocol (TCP) session between a terminal and a gateway (or a server), the TCP session is authenticated, and whether or not to generate the TCP session is determined on the basis of a result of the authentication, thereby preventing, in advance, a target application within the terminal from bypassing control of an access control application and transmitting a data packet to a destination network through an authorized tunnel.