How does a VPN work?

Category: 2-World

A VPN is also known as a Virtual Private Network, it can effectively build up or enable secure remote access from existing private networks. Administrator can connect remote or mobile workers to private networks by using a VPN. Users can work as if their computer are connected to the network even they are far away from it.


How can it do that? VPN clients use a Connection Manager profile to initiate a connection to a VPN server to make it possible. The user session, will be authenticated and authorized by an Internet Authentication Service server which the VPN server communicate with. The connection is under the control of the VPN client or the VPN server, it can be continued or finished by either of them. All services available to a LAN-connected client are enabled by VPN.

VPN clients use standard tool (e.g Windows Explorer) to access resources. VPN clients use Windows Explorer to connect to printers and make drive connections. The best advantage of this connection is the connection will be persistent for a long time. You don’t need to reconnect to the network resources again and again because the connection will not be dropped all the time. Most commercial and custom application can work without modification as VPN fully supports drive letters and universal naming convention names.

VPN are point-to-point connections across a private or public network network such as the Internet we use often. A VPN client uses tunneling protocols to make a virtual call to a virtual port or a VPN server. Typically, a VPN client initiates a virtual point-to-point connection to a remote access server over the Internet. Then the remote access would answer the call and transfer data between the VPN client and the private network after authenticating the caller. The data will be encapsulated or wrapped with a header for emulating a point-to-point link and will be sent as encryption for emulating a private link. The data on the shared or public network are impossible to be intercepted without the encryption keys. The data is private which is encapsulated and encrypted, in other words, a VPN connection is safe.

In conclusion, A VPN makes cost-effective, functional, and secure connections at a low cost possible. Choose one that best meets your needs.