Method for realizing NAT traversal

A technology of IP address and port number, which is applied in the field of communication and can solve the problem that IP address cannot be converted by NAT.

Active Publication Date: 2020-05-08
HANGZHOU DPTECH TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, this application provides a method and device for realizing NAT traversal to

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  • Method for realizing NAT traversal
  • Method for realizing NAT traversal
  • Method for realizing NAT traversal

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Embodiment Construction

[0021] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0022] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides a method for realizing NAT traversal. When an NAT device determines that a received control message sent by a first network device in a private network to a second network device in a public network is a specified control message based on a GAT-1400 protocol, a first private network IP address and a first port number in a URL carried by the control message are acquired; NAT(Network Address Translation) is performed on a second private network IP address serving as a source IP address of the control message according to an NAT strategy to obtain a public network IP address, and the public network IP address is taken as a target IP address for converting the first private network IP address; a port number range is searched for an unoccupied idle port number corresponding to the public network IP address to serve as a target port number for converting the first port number; and the first private network IP address is converted into the target IP address, the firstport number is converted into the target port number, and the converted control message is sent to the second network device in a public network.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a method for realizing NAT traversal. Background technique [0002] At present, face recognition, license plate recognition, etc. are transmitted using the GAT-1400 standard. The recognition mainly involves the transmission of two pictures: one is a small picture, which is the picture of the recognition target (such as a face or a license plate). The second is the big picture, that is, the scene map. A small image is a part of a larger image. When transferring small images, the storage location URL and image data of small images are usually transmitted. When transferring large images, because the data volume of large images is relatively large, usually only the storage location URL of large images is transmitted, and the receiver can preview or download large images from the URL as needed. picture. [0003] At present, when an image storage device transmits...

Claims

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Application Information

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IPC IPC(8): H04L29/12
CPCH04L61/256
Inventor 方海名钱雪彪
Owner HANGZHOU DPTECH TECH
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