the way to establish VPN connection in XP system
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 connected to an Internet LAN, 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.