The system of the invention is configured to receive from a client device (41) located in the mobile communication network (1) a request to connect to a home area network (5), determine an identifier of a residential gateway (61) in the home area network or of a fixed-line network (3) to which the home area network is coupled, and transmit a request for an address and a range of addresses in the home area network to the residential gateway or the fixed-line network corresponding to the determined identifier. The system is further configured to receive the address and the range of addresses from the residential gateway or the fixed-line network, transmit the address to the client device, establish a tunnel with the residential gateway and establish a forwarding rule at a forwarding function (15) of the mobile communication network.