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A method for network address translation

A network address translation and IP address technology, applied in the field of network address translation, can solve the problems of complex upper-layer software and low network address translation efficiency, and achieve the effect of simple principle, simplified implementation complexity, and high address translation efficiency.

Active Publication Date: 2007-07-11
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the defects that the upper layer software of the existing routing equipment is too complicated and the network address translation efficiency is low, thereby providing a simple and efficient network address translation method

Method used

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  • A method for network address translation
  • A method for network address translation
  • A method for network address translation

Examples

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Embodiment 1

[0062] Taking a home local area network as an example, the method of the present invention is described. In a home local area network, multiple household appliances with network interfaces are connected to an internal network interface of a home gateway, and all the home appliances connected to the home gateway form a home local area network. There is also an external network interface on the home gateway, through which the home gateway is connected to the Internet, thereby realizing the connection between the home local area network and the Internet. Assume that in the home LAN in this embodiment, household appliances include an air conditioner, a washing machine, and a home computer. These appliances are all connected to the internal network interface on the home gateway.

[0063] The home appliances in the home LAN need to implement network address translation to interact with an external host in the Internet. The present invention constructs a new data structure "Process...

Embodiment 2

[0090] In some private networks, some internal terminals will not take the initiative to request access to the network. For example, in a "digital home", an air conditioner with networking function cannot access terminals in the public network. But the user needs to control it remotely, so it needs to be configured.

[0091]In actual implementation, some reserved globally unique port numbers are assigned to the internal terminals in the private network. For example, the port numbers in the range of 65000~65530 are used as reserved port numbers and allocated to "passive" devices such as air conditioners. The user configures the home gateway through a computer. The specific configuration content is to establish a PCB data structure for similar "passive" devices. . For example, the terminal IP address of an air conditioner is IP_aircondition; the address of the internal network interface connected to the home gateway is IP_local_air; the globally unique port number assigned to i...

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Abstract

This invention discloses one network address conversion method to realize conversion between public and private network addresses by use of process control block, wherein, the method comprises the following steps: converting the private address into public address; converting the private address into public address and establishing control block in the house network gate and modifying the data frame terminal number and source IP address and sending the data frame to the public network; modifying the data frame aim IP address and aim terminal number according to the process control block information.

Description

technical field [0001] The invention relates to computer network technology, in particular to the realization of network address translation. Background technique [0002] With the maturity of broadband technology, home networking will become an important part of the entire society's informatization. In order to meet the continuously increasing demand for broadband services, a new concept of "digital home" is proposed. Businesses in the "Digital Home" category can be divided into four types: [0003] 1. Home entertainment and communication: provide services such as digital TV, video and audio on demand, time-shift TV, online games, video telephony, and distance education through set-top boxes; [0004] 2. Home security category: provide monitoring and alarms for families, such as intrusion alarms, outdoor alarms, smoke / overflow monitoring and alarms, etc.; [0005] 3. Home automatic control: use the network to control home appliances, lighting control, door and window cont...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/66H04L29/06H04L29/12
Inventor 鄢贵海付斌章韩银和张飞飞刘彤雷韶华李晓维
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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