Method of achieving IP address cheating prevention based on analysis of dynamic host configuration protocol (DHCP) message

摘要: A method of achieving IP address cheating prevention based on analysis DHCP message relates to the field in a passive optical network, comprising following steps: S1, an network terminal captures transferred CPU, analyzes registered message, and obtains user Intelligent Peripheral Node (IPN) that is obtained by lower user, IPN being when server protocol officially take effect; S2, generates access control list from IPN, then binds legal port, simultaneously sets intercepts other source which IPN. The dynamically acquires port white black achieves function preventing cheating.