A network traversal method, device and system
A network and network address translation technology, applied in the field of devices and systems, and network traversal methods, can solve problems such as network delay, existing system deployment changes, and increase the burden of TURN servers, so as to save network overhead costs and achieve simple effects.
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Embodiment 1
[0044] An embodiment of the present invention provides a network traversal method, which is applied to figure 1 the scene shown. like figure 1 As shown, in this scenario, the customer service center 100 is located behind a symmetrical firewall / NAT 110, and is used to process the call request of the user terminal 160 and provide service support. Firewall / NAT110 is a symmetric NAT, which is used to provide network security defense and network address translation. The SIP server 140 (or operator SBC, including four components SIP user agent, SIP registrar, SIP proxy server and SIP redirect server) is used to complete the establishment of the SIP session. The central server 120 is used for processing call requests from the user terminals 160 . The access server 150 is used for access control of the local user terminal 160, where the user terminal 160 may be located in a public network or a private network.
[0045] It is worth noting that this scenario takes a symmetric firewa...
Embodiment 2
[0067] Similar to the first embodiment above, this embodiment provides a method for network traversal, running on a network address translation device, the network address translation device includes but not limited to the above-mentioned firewall / NAT110, and the network address translation device is pre-installed locally binding the mapping relationship between the private network port number and the second terminal, wherein the binding mapping relationship is an authorization rule independent of the inherent forwarding rules of the network address translation device, and the The private network port number is unique in the private network; preferably, the network address translation device freezes the inherent public network port number consistent with the private network port number in the inherent forwarding rules, so as to avoid privilege rules and inherent forwarding rules conflict.
[0068] like image 3 As shown, the network traversal method includes:
[0069] Step S...
Embodiment 3
[0072] Similar to the first embodiment above and corresponding to the second embodiment above, this embodiment discloses a network traversal method, which runs on the second terminal of the private network, such as Figure 4 shown, including:
[0073] Step S33, setting a unique private network port number in the private network.
[0074]Step S44: Initiate a SIP call request to the first terminal, and the sent INVITE request message carries the public network IP address of the second terminal and the private network port number of the second terminal, so as to establish an RTP session connection with the second terminal.
[0075] Optionally, before initiating the SIP call request to the first terminal, the method further includes:
[0076] An instruction from the central server is received, and the instruction is made by the central server after inquiring about the conversation situation of the customer service center and selecting the second terminal according to prefabricate...
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