Method for accessing private network through layer 2 tunneling protocol and server

Abstract

The invention discloses a method for accessing a private network through a layer 2 tunneling protocol, which includes that: when receiving message sent by a public network client side and needing to be transmitted into the public network, a lonworks network server (LNS) sends a network segment where a target address carried by the message locates in and mask information to the public network client side, and the public network client side adds corresponding redirection route information in a route with an output interface as an interface of the public network, wherein network segment information and the mask information serve as redirection route information. Based on the same concept, the invention further provides a server. By aid of the server, on the basis of not affecting private network accessing of the public network client side, the public network client side can access the public network conveniently without performing any manual configuration.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a server for accessing a private network through a two-layer tunnel protocol. Background technique [0002] With the popularization of IP networks and the increasing awareness of network security, various enterprises and small Internet service providers (ISPs) have established relatively isolated and exclusive corporate private networks, making use of public networks, such as Integrated Services Digital Network (ISDN) or The application of the dial-up function of the public switched telephone network (PSTN) to access the public network to realize the virtual private network is becoming more and more common. The Layer 2 Tunneling Protocol (L2TP) technology establishes a secure virtual private network for enterprises on the public network. Enterprises stationed abroad and personnel on business trips can remotely connect to the enterprise headquarters through the...

AI Technical Summary

Problems solved by technology

[0005] Both of the above two solutions have certain shortcomings. Users must master certain network knowledge. On the basis of not affecting public network users' access to the private network, the public network client needs to be manually configured to access the public network.

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