Method and device for implementing inter-access between virtual private networks by conversion of network addresses

A network address translation and virtual private network technology, applied in the network field, can solve the problems of complex implementation of mutual access between VPNs, difficult configuration and management, and achieve the effect of high security and simple management

Active Publication Date: 2008-10-15
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for mutual access between VPNs through NAT, so as to solve the p

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  • Method and device for implementing inter-access between virtual private networks by conversion of network addresses
  • Method and device for implementing inter-access between virtual private networks by conversion of network addresses
  • Method and device for implementing inter-access between virtual private networks by conversion of network addresses

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Embodiment Construction

[0046] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings.

[0047] The invention discloses a method for mutual access between VPNs through NAT, one embodiment of which is as follows figure 2 shown, including the following steps:

[0048] S201. Configure a shared VPN and a corresponding NAT address pool, and publish routing information of the NAT address pool to each VPN.

[0049]In order to implement mutual access between VPNs through NAT translation, a translated address pool must exist. Embodiments of the present invention first set a shared VPN in the network, which can be a VPN network with real computers, or a virtual VPN; then configure one or more address pools for the shared VPN, i.e. NAT address pool. The configured address pool includes the address pool of source address translation and the address pool of destination address translation, and whether it is static translation or dynamic tr...

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Abstract

The invention discloses a method for realizing exchange of visits by transforming NAT through network address among VPNs of a virtual private network. The method comprises the steps as follows: firstly, shared VPNs and a corresponding NAT address pool are configured, and the routing information of the NAT address pool is released to all VPNs; secondly, when a data packet visit is initiated in a source VPN, NAT of both the source address and the destination address are transformed according to the NAT address pool, and destination VPN is determined according to the destination address or the transformed destination address; finally, the routing transmission of the data packet is carried out in the destination VPN. The invention also discloses an NAT device that realizes exchange of visits among VPNs. By applying the method and the device that realize exchange of visits through NAT among VPNs of the invention can conveniently realize exchange of visits among VPNs; moreover, the method and the device of the invention have simple configuration and management and high security.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a method and device for mutual access between VPNs (Virtual Private Network, virtual private network) through NAT (Network Address Translation, network address translation). Background technique [0002] With the rapid development of Internet technology, the use of MPLS (Multiple Protocol Label Switch, multi-protocol label switching) to provide users with L3VPN (Layer 3VPN, Layer 3 VPN) has become increasingly common. The public network implements internal network isolation, but at the same time, due to the needs of practical applications, there may be a need for mutual access between different VPNs. [0003] At present, direct mutual access between multiple VPNs can be realized by ensuring that the address allocation between VPNs is globally unique, but this solution requires unified planning when the network is set up, and management will be strictly implemented in acc...

Claims

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Application Information

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IPC IPC(8): H04L12/46H04L12/56H04L29/06H04L29/12
Inventor 卢胜文
Owner NEW H3C TECH CO LTD
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