Patent ID: 8812691

Claim:
A method for binding an address of a user terminal in an access equipment, comprising: receiving, by the access equipment, a Dynamic host configuration protocol (DHCP) protocol response message from a DHCP server during a process in which the DHCP server assigns an internet protocol (IP) address to a user terminal, wherein the DHCP protocol response message comprises a media access control (MAC) address of the user terminal and the IP address assigned to the user terminal; binding, by the access equipment, the MAC address of the user terminal and the IP address assigned to the user terminal with the port information of the port on the access equipment, wherein the port information indicates a port that receives a DHCP request message from the user; inquiring, the by access equipment, the dynamic, binding table according to a MAC address of a given user terminal and an IP address of the given user terminal in an IP message and port information of a given port where the IP message is captured; forwarding the captured IP message if the MAC address of the user terminal and the IP address of the given user terminal corresponding to the port information of the given port exist; and not forwarding the IP message otherwise; wherein binding the MAC address of the user terminal and the IP address assigned to the user terminal with the port information of the port on the access equipment comprises: recording, by the access equipment, a binding relationship among the MAC address of the user terminal, the IP address assigned to the user terminal, and the port information in a dynamic binding table.