Network address translation (NAT) type determination method and device

A type and purpose technology, applied in the field of determining the NAT type, can solve the problems of lack of efficiency, cumbersome process, unable to meet the NAT detection request, etc., to save the detection time and obtain the effect quickly.

Active Publication Date: 2011-09-21
SHENZHEN TENCENT COMP SYST CO LTD
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Problems solved by technology

However, in the existing solution, if the UDP failure is ruled out, at least two test packets must be sent to detect the type of NAT; moreover, the test packets are sequentially dependent and must be followed step by step. next test
Obviously, the existing serialized NAT type test method cannot meet the NAT detection requests of large-scale clients, and the existing scheme is quite cumbersome in process and lacks efficiency

Method used

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  • Network address translation (NAT) type determination method and device
  • Network address translation (NAT) type determination method and device
  • Network address translation (NAT) type determination method and device

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Embodiment Construction

[0068] image 3 It is a schematic diagram of the STUN test scheme of the present invention, such as image 3 As shown, the STUN test scheme of the present invention is based on the core idea of ​​the standard STUN protocol, including two STUN Servers, following the agreement agreed by both parties between the two STUNServers and the STUN Client, in image 3 In the technical solution shown, two test items are required, where request packet a and request packet b represent the request packets of these two test items respectively, and request packet a and request packet b are sent from the STUN Client to the same STUN at the same time Server( image 3 Take STUN ServerA as an example) in different ports ( image 3 Take port X and port Y as an example); STUN ServerA and STUN ServerB return the response packet according to the corresponding protocol, image 3The four response packets shown in are represented by dot-dash arrow lines, dot-dash arrow line 1, dot-dash arrow line 2, d...

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Abstract

The invention provides a network address translation (NAT) type determination method and an NAT type determination device. The method comprises that: a simple traversal of user datagram protocol through network address translators (STUN) client simultaneously transmits a request packet of a first test item and the request packet of a second test item to a first port and a second port of a first STUN server respectively; the first STUN server and a second STUN server return corresponding response packets; and the STUN client judges the NAT type of a client according to the received response packets. By the NAT type determination method provided by the invention, dependence on the sequence of test packets is avoided, and NAT type detection time is shortened by parallel testing. Moreover, the NAT type determination method provided by the invention is simpler and more highly efficient.

Description

technical field [0001] The invention relates to network address translation (NAT) technology, especially a method and device for determining the type of NAT. Background technique [0002] With the continuous increase of the number of computers connected to the Internet, Internet Protocol (IP) address resources are increasingly stretched. In this case, Network Address Translation (NAT) technology has emerged as the times require. For a while, NAT became popular as a solution to the shortage of IPv4 addresses to avoid the difficulty of reserving IP addresses. Not only that, the use of NAT technology can also effectively avoid attacks from outside the network, hide and protect computers inside the network. Although NAT technology has played a positive role in solving the shortage of IP address resources and protecting internal computers, on the other hand, NAT technology is undoubtedly contrary to the openness of the Internet and has greatly affected many applications. For th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L29/06
Inventor 王志华陈谦鲁小锁邵颖哲
Owner SHENZHEN TENCENT COMP SYST CO LTD
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