Abstract: An address translation device includes a connection searching module, a table creation module, a media access control (MAC) address searching module, and a forwarding module. The connection searching module receives a packet, and searches a connection mapping table according to the packet. The connection mapping table includes a plurality of connection entries, and each connection entry includes a routing entry. The connection searching module further determines whether a connection entry with a connection matching that of the packet is found in the connection mapping table. The table creation module creates a connection entry in the connection mapping table, and creates a routing entry in the connection entry. The MAC address searching module acquires a destination MAC address from the routing entry of the connection entry in the connection mapping table. The forwarding module adds the acquired destination MAC address to the packet, and forwards the packet.