Fremgangsmåde og anordning til tilvejebringelse af sikkerhed gennem netværksadresseoversættelser under anvendelse af tunnelering og kompenseringer

摘要

Address translation is provided by a network address translator (305) for communication of data packets between a first device and a second device. At least one of the devices sends at least one keepalive packet before a time out of a determined network address translation. In response to receiving the at least one keepalive packet, the NAT maintains the determined network address translation for the communication of data packets between the first device and the second device.