Secrets of Windows XP operating system Virtual private network

It is well known that data sent using the public Internet is generally not protected from theft, for example, there are a lot of hacker articles on the internet that can steal data from the Web, but if you take advantage of Windows XP's virtual private network (VPN) connection, you will ensure that the Internet The security of communications, and can also extend your private network! VPN technology is well suited to the needs of mobile office and remote unified collaboration, so it has been developing rapidly in recent years.

VPN (Virtual private network), the Chinese translation is a fictitious private network, use the VPN technology, the user can connect to an internal network remotely through the Internet (for example an enterprise's LAN), after authentication, even if the user is in the other end of the Earth, You can also access this network as if you were accessing a local network resource. At the same time, because it uses special encryption technology, it can ensure that the data in the intranet is not stolen by other users on the Internet.

VPNs use a technology called tunneling that securely transmits data over the Internet to remote access servers on your workplace network. When you use a VPN, you can save a significant amount of money by making a secure connection to a private network using the public Internet rather than long-distance calls. In addition, because the VPN encrypts the Internet connection, it is also very secure. The new authentication and encryption protocols are enforced by the remote access server, and sensitive data transmitted over the Internet is secret to the public, while legitimate users can access the confidential data securely through VPNs.

Ways to create a VPN connection

There are two ways to create a VPN connection: a dial-up connection to an Internet service provider (ISP), or a direct connection to the Internet.

If you are dialing in to your ISP, your ISP will then call the private network's remote access server to establish a PPTP or L2TP tunnel. After authentication is complete, you can access the private network.

If you are already connected to the Internet, local area network, cable modem, or digital Subscriber line (DSL), you can build a tunnel over the Internet and connect directly to the remote access server, and after authentication, you will be able to access your corporate network.