QoS (Quality of Service) method, device using external filter, computer equipment and medium

The invention belongs to the technical field of communication, and relates to a QoS method, device using an external filter, computer equipment and a medium. The method comprises the following steps: configuring a routing table and a flow table, placing a three-layer interconnection interface in the routing table according to the configured routing table and flow table, and through the flow table, matching a two-layer gateway interface to the routing table for processing; and forwarding the internal flow passing through the three-layer interconnection interface or the two-layer gateway interface to an external filter according to a QoS (Quality of Service) rule. All internal flows are forwarded to the public network gateway, so that all the flows are firstly transferred to the external firewall filter, uniformly filtered by the firewall and then revolved to the public network gateway and the QoS equipment, and all the internal flows firstly pass through the external firewall, the flow table and the routing ta