How to achieve efficient and secure VPN connection under XP system

how to achieve efficient and secure VPN connection under XP system

What is a VPN?

Virtual private network (VPN private network) refers to the technology of establishing a private network on a public network.

It is called a virtual network, the main reason is that the connection between any two nodes of the entire VPN network does not have the End-to-end physical link required by the traditional private network, but the network platform provided by the public service provider, such as the Internet, ATM (asynchronous transfer Mode), frame Relay (frames Relay And so on, the user data is transmitted in the logical link.

It covers extensions of private networks that encapsulate, encrypt, and authenticate links across shared networks or public networks.

The VPN mainly adopts tunneling technology, encryption and decryption technology, key management technology and user and equipment identity authentication technology.

How to implement efficient and secure VPN connection settings under Windows XP operating system tutorial

Now, generally have a certain scale of enterprises, basically in other regions have some branches, factories or offices and other institutions, how efficient, safe, low input to these branches of the network and the headquarters of the network to connect each other, become an obstacle to enterprise informatization.

System Encyclopedia This article shares a simple and easy to implement VPN connection technology to help enterprises solve this problem.

Success Stories:

A large enterprise distributed all over the world, now to the various branches of the LAN interconnection, so that the computer within the enterprise through this connection can be efficient and secure access to internal resources, or even any two computers can access each other.

Solution:

SoftEther is a free virtual network card software, can simulate the operating sequence of Ethernet cards, and can simulate the hub function (download address: Http://xjrx-http.skycn.com:8181/down/HA-SoftEther-CHX.exe); There is a bridging feature in the Windows XP and Windows 2003 network connection, which allows you to bridge a physically separate two network segment into a local network through two network adapters.

Accordingly, a VPN connection is designed as shown in Figure 1.

Figure 1 E1, E2, E4, E5 for Ethernet cards, where E1, E5 connected to the internal LAN, E2,E4 connected to the external Internet, and E2 on the Internet has a fixed IP address; E3, E6 for SoftEther virtual out of the network card, are connected to softether virtual out of the hub.

In accordance with Figure 1 connection, just E1, E3 Bridge, E5, E6 Bridge can connect all branches of the LAN together.

The specific configuration reference is as follows:

Headquarters Server A configuration:

Must be installed as a Windows XP or Windows2003 operating system. Where the E1 is connected to the internal LAN, which is set to:

ip:192.168.0.2 mask:255.255.0.0 gateway:192.168.0.1

E2 connected to the Internet, it is best to apply for fixed IP.

If you are using ADSL connection extranet, preferably a monthly, this server never shut down, then its IP address from the ISP is also equivalent to fixed IP.

This assumes that the E2 fixed IP is: 202.98.168.10, the gateway is: 202.98.168.1.