METHOD OF IMPLEMENTING MULTIMEDIA PROTOCOL PASSING THROUGH NETWORK ADDRESS TRANSFORM DEVICE

摘要

The present invention discloses a method of implementing traversal of multimedia protocols through Network Address Translation device, the method comprising: A terminal in a private network sending a request message to a terminal of a public network with which it connects to obtain the source address for sending media streams; The terminal of the private network sending a redirect packet to the source address; The NAT device replacing the source address in the redirect packet with a common address and sending it to the terminal of the public network, and establishing the mapping relationship between the source address and destination address in the redirect packet before the replacement and the source address and destination address in the resulting redirect packet after the replacement; The terminal of the public network sending media stream with the common address as the destination address, the NAT device mapping the destination address in the media stream to the address of the terminal in the private network in accordance with the mapping relationship.