receiving, by a remote acceleration gateway, a second service request packet sent by a client, wherein a source internet protocol (IP) address of the second service request packet is an IP address of the client and a destination IP address is an IP address of the remote acceleration gateway;

performing, by the remote acceleration gateway, destination address translation on the second service request packet to generate a first service request packet, wherein a source IP address of the first service request packet is the IP address of the client, the destination IP address is a public IP address associated with a virtual machine, the virtual machine is configured to provide a business service for the client, and the destination address translation is based on a binding relationship between an acceleration IP address of the remote acceleration gateway and the public IP address associated with the virtual machine;

encapsulating, by the remote acceleration gateway, the first service request packet to generate a first overlay packet, wherein the first overlay packet carries the IP address of the remote acceleration gateway; and

sending, by the remote acceleration gateway, the first overlay packet to a border gateway on which the virtual machine is located.