Abstract: Enabling a host system to communicate with and to identify at least one client device that communicates with the host system through a network address translator device includes enabling communications from a first client device through the network address translator device. A data packet is received that includes a payload portion and an attribute portion, where the attribute portion includes a destination address that indicates a destination for the data packet and a nearest source address. A portion of the received data packet other than the nearest source address is examined for a host-assigned identifier that identifies a client device that communicated the received data packet. The received data packet typically is processed in accordance with predetermined host system controls accessible to the host system for the first client device identified, such as host-enabled parental controls.