How to make a valid VPN connection in the ADSL Router Application

As a widely used access network method, the technology of the ADSL Router is very mature. Next we will give you a detailed analysis on how to perform VPN connection. Virtual Private Network (VPN) is an extension of a Private Network. It contains Internet-like shared or public Network connections. Through VPN, data can be sent between two computers through a shared or public network through a simulated point-to-point dedicated link.

If it is more common, VPN is actually a "line in the line", type on the city Avenue "bus line", the difference is, A "line" composed of VPN does not exist physically, but is simulated by technical means, that is, "virtual. However, this virtual private network technology can establish a logical private "channel" for two computers on a public line, which is well confidential and not confidential, this allows both parties to establish a free and secure point-to-point connection. Therefore, it is widely concerned by network administrators. Currently, it is common for small and medium-sized enterprises to connect to the Internet through the ADSL Broadband network and establish their own LAN, and the use of VPN has become wider and wider.

I have known many friends who have connected their computers and the LAN of the Organization through VPN. I found through investigation that there are usually two methods to achieve the VPN connection of the LAN: one is that a single VPN connection can be made on the client in the LAN, establish a VPN connection of PPTP or IPSEC through the VPN function of the computer or client software, and establish a VPN connection of B2BBranch to Branch on the ADSL Router.

The two methods have their own advantages and disadvantages. If a VPN connection is established for a single computer, the advantage is that when a computer in the LAN establishes a VPN connection, it will not affect other computers to connect to the public network, the disadvantage is that only one computer can establish connections at the same time, which is suitable for enterprise users, especially when there are many enterprise computers.

After establishing a B2B VPN connection, computers in the LAN are connected to the VPN, and all the connections are established on the VPN, which affects the speed of connecting to the INTERNET, data is encrypted, and all connections must be transferred through the VPN Server. This is suitable for situations where you often need to connect to the Internet and computers in the LAN. Below I will write out my VPN setup process to share with you:

Lan configuration Scheme

1. Lan scheme. The author sets up a LAN through hardware routing. The network structure 1 is shown in. It includes an ADSL Router, an ADSL access device, and a HUB. Because the computer in the LAN does not have a public IP address, what is obtained from the ISP during ADSL connection is a dynamically assigned IP address. Therefore, only one computer in the LAN can connect to a VPN, however, the connection is arbitrary, and a computer in the LAN is connected to the VPN, which does not affect the connection of other computers to the public network.

2. Lan configuration: Establish a LAN through the ADSL Router. Theoretically, a maximum of 253 computers can be connected. The ADSL Router configures the Router IP address 192.168.1.1 by default from the factory. other clients in the LAN can configure the IP address as 192.168.1. * set the gateway to 192.168.1.1 and the subnet mask to 255.255.255.0. The following uses Vigor ADSL Router as an example to describe how to configure the gateway.

The configuration of the ADSL Router is controlled on the WEB interface and accessed through IE on the client. For more information about the configuration of the ADSL Router, see the relevant documentation. here only the configuration method for connecting to the ADSL Router is involved. In the configuration of the ADSL Router, click "Internet Access Setup" to select the INTERNET connection mode. The Vigor ADSL Router can connect to network connection modes such as ADSL, ISDN, and DDN, ADSL can be connected through the PPPOE protocol. Click "PPPOE" to configure PPPOE.

In PPPOE Setup, select "Enable" to Enable the PPPOE connection function. In "ISP Access Setup", enter the relevant information: ISP Name is the ISP Access service provider, username is the account assigned to the user by the ISP, and Password is the Password. In this way, the computer network connection in the LAN is achieved, which is equivalent to using the ADSL Router as the proxy server. However, this server can be activated at any time and is also disabled at any time, as long as the computer in the LAN starts, the ADSL Router automatically starts the service and performs ADSL dialing to complete network connection. When all computers in the LAN are disabled, the ADSL Router also automatically closes the network service. After the network connection is configured, the client in the LAN can establish a single VPN connection, but at the same time, only one computer may be connected. To achieve the VPN connection of the entire Lan, you must also configure the connection.