Maintaining accessibility of a mobile network based on temporary IDs names.

Method for operating a mobile network (Mobile Network) to provide an accessibility service to connect portable nodes (PN) of the mobile network (Mobile Network) to at least one fixed network external (own network MR home network PN) to through at least one mobile router (MR), characterized in that identifiers temporary names to the portable nodes (PN) are assigned and mapped to current reachable addresses of the portable nodes (PN) by at least one proxy name server (DNS MR pROXY).