

There are a lot of paid VPN solutions those provides enterprise virtual network solutions using their own infrastructure. For example, if you are using some public internet with low security but you want to perform some business work through the secure channel you can use the VPN servers for that. The VPN servers provide a capability to a company or a person to use public infrastructure at a lower cost than the private one but with security. Open source VPN server is a part of the network to provide a virtual private network that uses tunneling protocol over internet from a secure communication channel between client and servers.
