METHOD FOR INTERCEPTING A NETWORK ACCESS OF AN INTERNET PROTOCOL TERMINAL CAPABLE OF ADDING A SIMPLE LOGIC TO A DYNAMIC HOST CONFIGURATION PROTOCOL ABOUT A TERMINAL IN WHICH A FLEXIBLE IP ADDRESS IS USED

摘要

PURPOSE: A method for intercepting a network access of an internet protocol terminal is provided to block the network access of an IP terminal by not authenticating the request if a corresponding terminal requests the allocation of an IP address or requests the usage extension of a previously allocated IP address.;CONSTITUTION: IP terminals which influences bad effect to a network is managed with a blacklist(301). If the DHCP(ynamic Host Configuration Protocol) message of the IP terminal is received(302), the backlist is checked(303). Because of a confirmation result, a response message corresponding to the DHCP message is transmitted if the IP terminal is not recorded on the backlist(304). Because of a confirmation result, no answer is operated if the IP terminal are recorded on blacklist(305).;COPYRIGHT KIPO 2012