the invention relates to a method for managing communication connections in a communication system , comprising the following steps : generation of a connection request with a source network address internally valid in the communication system , over at least one network address translating network node to a network element outside the communication system , acceptance of a connection confirmation with a valid network address of a network element outside the communication system , providing the source network address internally valid in the communication system an the network address valid outside the communication system to a connection entry provided on the network element outside the communication system .