PPTP

PPTP (point-to-point tunneling protocol) is a type of connection that allows encrypted information to be transmitted over an insecure TCP/IP connection. The transmitted packets are automatically formatted to standard IP. Such connection is not characterized by high security, but it is very popular.

Application

This type of connection takes place in the following cases:

• protecting the transmitted information between two users;
• creating a secure tunnel between local networks, excluding direct contact between them;
• creating a secure channel through which a user connects to a particular server;

Principles of operation

The connection is established using PPP session and GRE protocol. The second channel is connected on TCP port. PPTP with the help of its own protocols processes the forwarded information and delivers it to the destination.