APPARATUS AND METHOD FOR CONTROLLING TRAFFIC BASED ON CAPTCHA

摘要

A traffic control device based on CAPTCHA and a method thereof are provided. A traffic control device according to the present invention includes: a traffic monitoring unit for monitoring packets which are transmitted and received between an internal network and an external network; a CAPTCHA verification unit for transmitting a CAPTCHA request message corresponding to packet information to a client computer in the internal network, receiving a CAPTCHA response message corresponding to the CAPTCHA request message and verifying the CAPTCHA response message when the packet information corresponding to the packet does not exist in an access control list; a list management unit for detecting a control policy corresponding to the packet information from the access control list when the packet information exists in the access control list; and a traffic control unit for controlling traffic between the internal network and the external network based on a verified result of the CAPTCHA response message or the control policy. [Reference numerals] (110) Traffic control unit; (120) Traffic monitoring unit; (130) List management unit; (140) CAPTCHA verification unit; (20) External network; (250) Application; (AA) Client computer; (BB) CAPTCHA agent; (S301,S302) Packet transmission; (S303,S305) Packet information transmission; (S306) CAPTCHA request message; (S307) CAPTCHA response message; (S308,S309) Verified result transmission; (S310) Traffic allowance or cut-off; (S311) Update