Patent ID: 8230007

Claim:
A method for permitting and blocking use of Internet by detecting plural terminals on network using more than one authorized IP, the method comprising: a step for analyzing a TCP/IP packet and redirecting a web connection of a client to a server according to a policy of a specific user in order to confirm the number of plural terminals of a subscriber constituting a private network by redirecting the web connection of the client to the server when monitoring traffic when the client uses the Internet, and to block or permit terminals exceeding a designated number of sharing terminals; a step for providing to the client a web page having specific functions to perform a selective blocking, and to execute a precision detection algorithm for detecting the number of terminals and notifying to the redirected client; a step for allocating a unique Cookie code value to the client in a real time manner via the server at the step for providing to the client a web page having specific functions; a step for registering the unique Cookie code value generated in the client together with an authorized IP of the client or an identifier corresponding to the IP on a Cookie pool DB of the server; and a step for confirming the number of terminals connected to the authorized IP or the identifier corresponding to the IP by counting the number of the unique Cookie code according to the authorized IP stored in the Cookie pool DB.