US Patent 9954898 Data flow forwarding method and device

This disclosure makes public a data flow forwarding method and device, and in this method, a second health state is acquired based on the first health state of one or more pieces of identifying information of the received data flow, wherein the first health state and second health state are associated with the access rights of the user and/or user device that sent the data flow; it employs firewall policy property sets to determine whether or not to forward the data flow, wherein the firewall policy property sets comprise: the second health state. The technical schemes based on this disclosure improve the ability of a firewall to identify network attacks or abnormal activities and reduce administration costs.