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Address conversion device and address conversion method

A technology of address conversion and address, which is applied in the field of address conversion devices and address conversion, can solve the problems of increased proxy server load and the failure of proxy server objects to implement NAT, etc., and achieve the effect of mutual communication

Inactive Publication Date: 2007-12-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the NAT realized by the above-mentioned proxy server, since all IP packets are relayed at the application level, the load on the proxy server will increase, and NAT cannot be realized for applications other than the target of the proxy server.

Method used

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  • Address conversion device and address conversion method
  • Address conversion device and address conversion method
  • Address conversion device and address conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0053] FIG. 4 is a diagram showing an example of a network configuration according to Embodiment 1 of the present invention. The network shown in this figure includes a private network 100 , a global network 200 and a gateway device 300 . Moreover, the private network 100 includes: a host 100a (private IP address "PA3") of the domain name "a.private.com", a DNS server 100b (private IP address "PA2") that manages the domain names of hosts in the private network 100 ”) and L2-SW100c. In addition, the global network 200 includes: an IP public network 200a, a host 200b (global IP address "GA4") of the domain name "a.global.com", and a DNS server 200c (global IP address "GA4") that manages domain names of hosts in the global network 200 GA3"). Further, the gateway device 300 is assigned a private IP address "PA1" at the private network 100; and assigned global IP addresses "GA1", "GA2" and "GA5" at the global network 200 end. This gateway device 300 is equipped with a DNS proxy ...

Embodiment approach 2

[0099] The feature of Embodiment 2 of the present invention is that, in addition to the name-address table, an SRV (SeRVice) record capable of notifying the port number is stored, and the global IP address and port, thus using NAPT (Network Address Port Transfer, Network Address Port Transfer) instead of NAT when converting the destination address.

[0100] The network structure of this embodiment is the same as that of FIG. 4 (Embodiment 1), and therefore its description is omitted. However, unlike the first embodiment, the gateway device 300 of this embodiment is assigned only the global IP address "GA1" on the global network 200 side.

[0101] 14 is a block diagram showing the configuration of the gateway device 300 according to this embodiment. In this figure, the same reference numerals are assigned to the same parts as those in FIG. 5 , and description thereof will be omitted. As shown in Figure 14, the gateway device 300 includes: a private network interface unit 301,...

Embodiment approach 3

[0129] Embodiment 3 of the present invention is characterized in that: when the host in the private network has a plug-and-play function such as the UPnP (Universal Plug and Play, Universal Plug and Play) protocol, the gateway device automatically creates port mapping .

[0130] The network structure of this embodiment is the same as that of FIG. 4 (Embodiment 1), and therefore its description is omitted. However, unlike the first embodiment, the host 100a of this embodiment has the UPnP protocol. In addition, the gateway device 300 of the present embodiment is assigned only the global IP address "GA1" on the global network 200 side as in the second embodiment.

[0131] UPnP refers to the organization called "UPnP Forum, Universal Plug and Play Forum" that has standardized technical specifications, which are used to connect devices such as computers, computer peripherals, AV equipment, and home appliances in the home via the network. thereby providing functionality to each o...

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Abstract

It is possible to perform access from a global network side to a private network side so as to realize mutual communication between the global network and the private network while maintaining security. A table setting unit (307) decides a correspondence between a private IP address and a global IP address and registers it in an address conversion table (310). The address conversion table (310) holds the private IP address and the global IP address while correlating them to each other.

Description

technical field [0001] The present invention relates to an address translation device and an address translation method, in particular to an address translation device and an address translation method for a gateway between a global network and a private network. Background technique [0002] At present, in the general network structure, the global network and private network are mixed together. The global network is composed of global IP addresses that can be used on the Internet. Private networks include home networks or corporate networks, etc. space composition. In the private network, private IP addresses that are not used by the global network are freely used. [0003] In such a network structure, when communicating across the global network and the private network, at the junction of the global network and the private network, an address translation (Network Address Transfer: NAT). This enables, for example, access to the global network by a host not assigned a glo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/66H04L12/56H04L12/70
CPCH04L29/12367H04L61/2038H04L29/12254H04L69/08H04L61/2514H04L63/0281H04L61/255H04L29/12462H04L61/5038H04L69/085
Inventor 田村智史桥本裕司饭野聪饭田健一郎神藏敦吏
Owner PANASONIC CORP
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