CN114553636A - Method and system for actively accessing local area network through relay LNS - Google Patents
Method and system for actively accessing local area network through relay LNS Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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Abstract
The invention provides a method and a system for actively accessing a local area network through a relay LNS, wherein the method comprises the following steps: configuring first information communicated with a remote terminal on a relay LNS, configuring first static routing information communicated with a local area network by the remote terminal, generating a host routing communicated with the remote terminal by the relay LNS, and acquiring a first static routing from the remote terminal to the local area network; configuring second information communicated with the L2TP access concentrator on the relay LNS, and configuring second static routing information from the relay LNS to the local area network; and the L2TP access concentrator is accessed into the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS. Based on the method, the invention also provides a system for actively accessing the local area network through the relay LNS, and the invention gets rid of the function and authority limitation of the existing gateway and flexibly solves the problem of actively accessing the local area network.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a method and a system for actively accessing a local area network through a relay LNS.
Background
Local area network equipment is often required to be remotely debugged and controlled in daily work; the local area network is generally accessed to the Internet through the NAT gateway, and although the NAT gateway accesses the local area network to the Internet, the local area network loses the end-to-end characteristic, so that a remote user cannot actively access the local area network. Where a NAT gateway is a network address translation device.
As shown in fig. 1, which is a schematic diagram of a conventional networking connection in the prior art, a local area network can be remotely and actively accessed through functions such as VPN and NAT Server provided by an NAT gateway, but this method is limited by whether the gateway has and opens the above functions; the purchase of third-party remote services also enables remote access, but causes some cost pressure. Among other things, VPNs enable enterprises to establish a secure WAN (wide area network) service over an inexpensive shared infrastructure with the same policies as those provided by private networks.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method and a system for actively accessing a local area network through a relay LNS. Through the L2TP network server, a remote access technical scheme with simple configuration, flexible adjustment, strong portability and high cost performance is provided, and active access to a local area network is realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of actively accessing a local area network through a relay LNS, comprising the steps of:
configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, generating a host routing communicated with the remote terminal by the relay LNS, and acquiring a first static routing from the remote terminal to the local area network;
configuring second information communicated with the L2TP access concentrator on the relay LNS, and configuring second static routing information from the relay LNS to the local area network;
and accessing the L2TP access concentrator into the local area network, and establishing communication connection between the L2TP access concentrator and the relay LNS through automatic dialing to realize that the remote terminal actively accesses the local area network through the relay LNS.
Further, the first information includes a first VT interface, an IP address pool, an L2TP tunnel name, and a dial-up account number.
Further, the generating of the host route for the relay LNS to communicate with the remote terminal, and the process of the remote terminal obtaining the first static route to the local area network includes: after the first information and the first static route information are configured, the remote terminal creates an L2TP tunnel through dialing, and after the L2TP tunnel is successfully established, the remote terminal obtains the first static route to the local area network, and meanwhile, the relay LNS generates a host route for communication with the remote terminal.
Further, the configuring, on the relay LNS, the second information in communication with the L2TP access concentrator includes: configuring a second VT interface for the access L2TP access concentrator on the relay LNS, and allocating a fixed IP address for a third VT interface on the L2TP access concentrator; and utilizing a host routing configuration source NAT strategy to convert the access local area network traffic source IP into a second VT interface address configured for the L2TP access concentrator on the relay LNS.
Further, the configuring the second static routing information for relaying the LNS to the local area network includes: the next hop accesses the third VT interface address on the concentrator for L2 TP.
Further, the process of accessing the L2TP access concentrator to the local area network and establishing a communication connection between the L2TP access concentrator and the relay LNS through automatic dialing includes:
configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
and configuring a source NAT policy, and converting the IP of the access local area network traffic source into an outgoing interface address of the L2TP access concentrator.
Further, the step of enabling the remote terminal to actively access the local area network through the relay LNS includes:
the L2TP access concentrator and the relay LNS automatically establish an L2TP tunnel, so that the remote terminal can not only actively access the local area network terminal, but also have the same access right as the local area network terminal.
The invention also provides a system for actively accessing the local area network through the relay LNS, which comprises a first configuration module, a second configuration module and a connection module;
the first configuration module is used for configuring first information communicated with a remote terminal and first static routing information communicated with a local area network on the relay LNS, the relay LNS generates a host routing communicated with the remote terminal, and the remote terminal obtains the first static routing to the local area network;
the second configuration module is configured to configure, on the relay LNS, second information for communicating with the L2TP access concentrator, and configure second static routing information from the relay LNS to the local area network;
the connection module is used for accessing the L2TP access concentrator into the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS.
Further, the detailed process implemented by the first configuration module includes: configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, after configuration is completed, the remote terminal creates an L2TP tunnel through dialing, after the L2TP tunnel is successfully established, the remote terminal obtains a first static routing to the local area network, and meanwhile the relay LNS generates a host routing communicated with the remote terminal.
Further, the detailed process implemented by the connection module includes:
configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
configuring a source NAT strategy, and converting an access local area network traffic source IP into an output interface address of an L2TP access concentrator;
the L2TP access concentrator and the relay LNS automatically establish an L2TP tunnel, so that the remote terminal can not only actively access the local area network terminal, but also have the same access right as the local area network terminal.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
the invention provides a method and a system for actively accessing a local area network through a relay LNS, wherein the method comprises the following steps: configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, generating a host routing communicated with the remote terminal by the relay LNS, and acquiring a first static routing from the remote terminal to the local area network; configuring second information communicated with the L2TP access concentrator on the relay LNS, and configuring second static routing information from the relay LNS to the local area network; and the L2TP access concentrator is accessed into the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS. Based on a method for actively accessing the local area network through the relay LNS, a system for actively accessing the local area network through the relay LNS is also provided. The invention gets rid of the function and authority limit of the existing gateway through the relay LNS, flexibly solves the problem of actively accessing the local area network, and meets the requirements of remote debugging and control. The implementation process of the invention is simple in configuration and strong in portability.
Drawings
Fig. 1 is a schematic diagram of a conventional networking connection in the prior art;
fig. 2 is a flow of a method for actively accessing a local area network through a relay LNS according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of an apparatus for implementing a method of actively accessing a local area network through a relay LNS in embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a system for actively accessing a local area network through a relay LNS in embodiment 2 of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
Example 1
The embodiment 1 of the invention provides a method for actively accessing a local area network through a relay LNS, which gets rid of the function and authority limitation of the existing gateway through the relay LNS and flexibly solves the problem of actively accessing the local area network.
In the present application: and relay LNS: an L2TP web Server (L2TP Network Server) is represented.
The LAC is the L2TP Access Concentrator (L2TP Access Concentrator).
The method comprises the following specific steps:
configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, generating a host routing communicated with the remote terminal by the relay LNS, and acquiring a first static routing from the remote terminal to the local area network;
configuring second information communicated with the L2TP access concentrator on the relay LNS, and configuring second static routing information from the relay LNS to the local area network;
and the L2TP access concentrator is accessed into the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS.
Fig. 2 is a flowchart of a method for actively accessing a local area network through a relay LNS according to embodiment 1 of the present invention;
in step S200, the process flow is started.
In step S210, configuring first information for communicating with a remote terminal and first static routing information for communicating with a local area network by the remote terminal on a relay LNS;
the first information includes a first VT interface, a pool of IP addresses, an L2TP tunnel name, and a dialing account number.
After the first information and the first static route information are configured, the remote terminal creates an L2TP tunnel through dialing, and after the L2TP tunnel is successfully established, the remote terminal obtains the first static route to the local area network, and meanwhile, the relay LNS generates a host route for communication with the remote terminal.
In step S220, the remote terminal dials to establish an L2TP tunnel between the remote terminal and the relay LNS generation. After the L2TP tunnel establishment is successful, the remote terminal obtains a first static route to the local area network while the relay LNS generates a host route for communication with the remote terminal.
In step S230, second information for communicating with the L2TP access concentrator is configured on the relay LNS, and second static routing information of the relay LNS to the local area network is configured.
Configuring a second VT interface for the access L2TP access concentrator on the relay LNS, and allocating a fixed IP address for a third VT interface on the L2TP access concentrator; utilizing a host routing configuration source NAT strategy to convert the access local area network flow source IP into a second VT interface address configured for an L2TP access concentrator on a relay LNS; the next hop accesses the third VT interface address on the concentrator for L2 TP.
In step S240, the L2TP access concentrator is accessed to the local area network, and the L2TP access concentrator establishes a communication connection with the relay LNS by auto-dialing.
Configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
and configuring a source NAT policy, and converting the IP of the access local area network traffic source into an outgoing interface address of the L2TP access concentrator.
In step S250, an L2TP tunnel is automatically established between the L2TP access concentrator and the relay LNS, so that the remote terminal can not only actively access the lan terminal, but also have the same access right as the lan terminal. The remote terminal then behaves as a terminal device in the local area network.
To implement the method for actively accessing the local area network through the relay LNS proposed in embodiment 1 of the present invention, fig. 3 is a schematic connection diagram of an apparatus for implementing the method. The apparatus comprises a relay LNS and L2TP access concentrator;
the relay LNS establishes a host route of the remote terminal communication by using the network and a second static route with the local area network; and the remote terminal is caused to obtain a first static route to the local area network;
the L2TP access concentrator is installed in the local area network, accesses the Internet through the NAT gateway in the local area network and is used for automatically establishing an L2tp tunnel with the relay LNS;
a local area network is connected below the NAT gateway, in the application, the L2tp access concentrator is installed in the local area network; then the L2tp access concentrator and the relay LNS automatically establish an L2tp tunnel through configuration; then, NAT conversion is utilized to enable the remote terminal to freely access the local area network terminal as if the remote terminal is connected in the local area network, so that the remote terminal can remotely access the local area network terminal by means of the tunnel established by the relay LNS under the condition that the NAT gateway is not opened and the NAT Server and the VPN are not provided.
The embodiment 1 of the invention provides a method for actively accessing a local area network through a relay LNS, which gets rid of the function and authority limitation of the existing gateway through the relay LNS, flexibly solves the problem of actively accessing the local area network, and meets the requirements of remote debugging and control.
Example 2
Based on the system for actively accessing the local area network through the relay LNS provided in embodiment 1 of the present invention, as shown in fig. 4, a schematic diagram of a system for actively accessing the local area network through the relay LNS in embodiment 2 of the present invention is shown; the system comprises: the system comprises a first configuration module, a second configuration module and a connection module;
the first configuration module is used for configuring first information communicated with the remote terminal and first static routing information communicated with the local area network by the remote terminal on the relay LNS, the relay LNS generates a host routing communicated with the remote terminal, and the remote terminal obtains the first static routing to the local area network;
the second configuration module is configured to configure, on the relay LNS, second information for communicating with the L2TP access concentrator, and configure second static routing information from the relay LNS to the local area network;
the connection module is used for accessing the L2TP access concentrator into the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS.
The detailed process implemented by the first configuration module comprises the following steps: configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, after configuration is completed, the remote terminal creates an L2TP tunnel through dialing, after the L2TP tunnel is successfully established, the remote terminal obtains a first static routing to the local area network, and meanwhile the relay LNS generates a host routing communicated with the remote terminal.
The detailed process realized by the second configuration module comprises the following steps: configuring a second VT interface for accessing the L2TP access concentrator on the relay LNS, and allocating a fixed IP address for a third VT interface on the L2TP access concentrator; and converting the local area network access traffic source IP into a second VT interface address configured for the L2TP access concentrator on the relay LNS by utilizing the host routing configuration source NAT strategy. The next hop accesses the third VT interface address on the concentrator for L2 TP.
The detailed process realized by the connection module comprises the following steps:
configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
configuring a source NAT strategy, and converting an access local area network traffic source IP into an output interface address of an L2TP access concentrator;
the L2TP access concentrator and the relay LNS automatically establish an L2TP tunnel, so that the remote terminal can not only actively access the local area network terminal, but also have the same access right as the local area network terminal.
The embodiment 2 of the invention provides a system for actively accessing a local area network through a relay LNS, and the whole process of the method is realized through a virtual system.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include the inherent elements. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto. Various modifications and alterations will occur to those skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. On the basis of the technical scheme of the invention, various modifications or changes which can be made by a person skilled in the art without creative efforts are still within the protection scope of the invention.
Claims (10)
1. A method for actively accessing a local area network via a relay LNS, comprising the steps of:
configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, generating a host routing communicated with the remote terminal by the relay LNS, and acquiring a first static routing from the remote terminal to the local area network;
configuring second information communicated with the L2TP access concentrator on the relay LNS, and configuring second static routing information from the relay LNS to the local area network;
and accessing the L2TP access concentrator into the local area network, and establishing communication connection between the L2TP access concentrator and the relay LNS through automatic dialing to realize that the remote terminal actively accesses the local area network through the relay LNS.
2. The method of claim 1, wherein the first information comprises a first VT interface, an IP address pool, an L2TP tunnel name, and a dial-up account number.
3. The method of claim 1, wherein the step of generating the host route for the relay LNS to communicate with the remote terminal, and the remote terminal obtaining the first static route to the local area network comprises: after the first information and the first static route information are configured, the remote terminal creates an L2TP tunnel through dialing, and after the L2TP tunnel is successfully established, the remote terminal obtains the first static route to the local area network, and meanwhile, the relay LNS generates a host route for communication with the remote terminal.
4. The method of claim 1, wherein configuring the second information on the relay LNS for communication with the L2TP access concentrator comprises: configuring a second VT interface for the access L2TP access concentrator on the relay LNS, and allocating a fixed IP address for a third VT interface on the L2TP access concentrator; and utilizing a host routing configuration source NAT strategy to convert the access local area network traffic source IP into a second VT interface address configured for the L2TP access concentrator on the relay LNS.
5. The method according to claim 1, wherein the configuring the second static routing information of the relay LNS to the local area network includes: the next hop accesses the third VT interface address on the concentrator for L2 TP.
6. The method of claim 1, wherein the accessing of the L2TP access concentrator to the local area network, the L2TP access concentrator establishing a communication connection with the relay LNS through automatic dialing comprises:
configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
and configuring a source NAT policy, and converting the IP of the access local area network traffic source into an outgoing interface address of the L2TP access concentrator.
7. The method according to claim 6, wherein the enabling the remote terminal to actively access the local area network through the relay LNS includes:
the L2TP access concentrator and the relay LNS automatically establish an L2TP tunnel, so that the remote terminal can not only actively access the local area network terminal, but also have the same access right as the local area network terminal.
8. A system for actively accessing a local area network through a relay LNS is characterized by comprising a first configuration module, a second configuration module and a connection module;
the first configuration module is used for configuring first information communicated with a remote terminal and first static routing information communicated with a local area network on the relay LNS, the relay LNS generates a host routing communicated with the remote terminal, and the remote terminal obtains the first static routing to the local area network;
the second configuration module is configured to configure, on the relay LNS, second information for communicating with the L2TP access concentrator, and configure second static routing information from the relay LNS to the local area network;
the connection module is used for accessing the L2TP access concentrator to the local area network, and the L2TP access concentrator establishes communication connection with the relay LNS through automatic dialing, so that the remote terminal can actively access the local area network through the relay LNS.
9. The system according to claim 8, wherein the detailed procedure implemented by the first configuration module includes: configuring first information communicated with a remote terminal and first static routing information communicated with a local area network by the remote terminal on a relay LNS, after configuration is completed, the remote terminal creates an L2TP tunnel through dialing, after the L2TP tunnel is successfully established, the remote terminal obtains a first static routing to the local area network, and meanwhile the relay LNS generates a host routing communicated with the remote terminal.
10. The system according to claim 8, wherein the detailed procedure implemented by the connection module includes:
configuring a third VT interface and an LNS server address on the L2TP access concentrator, configuring the L2TP access concentrator as an automatic dialing, and automatically establishing an L2tp tunnel with the relay LNS;
configuring addresses of the same network segments as the local area network terminal for the L2TP access concentrator output interface;
configuring a route from the L2TP access concentrator to the local area network, wherein the next hop is a gateway address of an output interface of the L2TP access concentrator; and configuring a backhaul route to the relay LNS;
configuring a source NAT strategy, and converting an access local area network traffic source IP into an output interface address of an L2TP access concentrator;
the L2TP access concentrator and the relay LNS automatically establish an L2TP tunnel, so that the remote terminal can not only actively access the local area network terminal, but also have the same access right as the local area network terminal.
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