Communication method for spanning gateway

A cross-network and gateway technology, applied in the field of network data communication, can solve the problems of restricting wide application, symmetric NAT communication without any help, etc., and achieve the effect of increasing security, wide application range and unlimited communication

Active Publication Date: 2009-02-25
GUANGDONG VIMICRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these two modes have their own defects. For example, the STUN mode does not help the communication of symmetric NAT, and although the TURN mode can realize various types of NAT communication, due to the respective characteristics of each type of NAT, address-restricted NAT, port The IP address and port of the data packet that can be received by restricted NAT and symmetric NAT must be the destination IP address and port of a data packet that was once sent from inside NAT to outside NAT
However, since the security of this technology is guaranteed by the UPnP terminal, it cannot be applied in occasions with high security requirements, which limits the wide application of this technology

Method used

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  • Communication method for spanning gateway
  • Communication method for spanning gateway

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Embodiment 1

[0031] Reference attached figure 1 The cross-gateway communication method provided in this embodiment is applied to a cross-gateway server, a gateway, and a private network terminal set in a public network (Internet network). Applies to the UDP protocol.

[0032] In the cross-gateway communication method, the step of starting the cross-gateway server is performed first.

[0033] The step of starting the cross-gateway server includes the step of setting and initializing the internal mapping table of the cross-gateway server and the step of opening the monitoring port port0 by the cross-gateway server for listening. in,

[0034] The step of setting and initializing the internal mapping table by the cross-gateway server specifically refers to: if there is no mapping table inside the cross-gateway server, the cross-gateway server will establish a mapping table, which is composed of several records, and each record is A quadruple whose specific content will be described below. ...

Embodiment 2

[0049] Reference attached figure 2 , this embodiment is similarly applied to the cross-gateway server and gateway set on the public network (Internet network), and the private network terminal set in the gateway as in the first embodiment. The difference is that the cross-gateway communication method provided by this embodiment is not only applicable to the UDP protocol, but also applicable to the TCP protocol. The specific process is as follows:

[0050] Same as Embodiment 1, the method of this embodiment also first performs the step of starting the cross-gateway server.

[0051] The step of starting the cross-gateway server includes the step of setting and initializing the internal mapping table by the server and the step of opening the listening port port0 by the server for listening. in,

[0052] The step of setting and initializing the internal mapping table by the cross-gateway server specifically refers to: if there is no mapping table inside the cross-gateway serve...

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Abstract

A cross-gateway communication method for the cross-gateway server on public network, gateway and private network terminal in the gateway includes such steps as starting the server through setting up server, initializing internal mapping list and turning on the audit port for auditing, sending a distribution request from private network terminal to the audit port of cross-gateway server via gateway, network address conversion to assign a port to said private network terminal by the gateway, receiving the distribution request by cross-gateway server, assigning another port, recording the mapping between said two ports in the mapping list, transmitting a reply to the private network terminal, receiving message by cross-gateway server and forwarding it to the private network terminal.

Description

technical field [0001] The invention relates to the field of network data communication, in particular to a method for cross-gateway data communication. technical background [0002] The protocol family adopted by the current global Internet is the TCP / IP protocol family. IP is the protocol of the network layer in the TCP / IP protocol suite, and is the core protocol of the TCP / IP protocol suite. The current version number of the IP protocol is 4 (abbreviated as IPv4). The current IPV4 IP address is 32 bits, which are further divided into three types of addresses: A, B, and C according to the first few digits; however, due to the rapid development of the Internet, IP resources are becoming increasingly exhausted, and there are fewer and fewer IP addresses available for distribution. There is a serious conflict with the rapid development of the Internet. In the case where IPV6 is far from being fully upgraded, only the proxy server is used to convert the internal network addr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/66H04L29/06
Inventor 陈绍新江峰
Owner GUANGDONG VIMICRO
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