In this section, we explain the general concepts of Virtual Private Networking
(VPN), in particular the Point to Point Tunneling Protocol (PPTP). Topics covered
in the section include:
• The key elements underpinning PPTP: authentication, tunneling and
encryption.
• The standard PPTP deployment: how a PPTP client interacts with a PPTP
server.
A Virtual Private Network (VPN) is a network which uses a public (inherently
insecure) network infrastructure, such as the Internet, to provide a private
(secured) connection between hosts and network applications. A VPN also
ensures the integrity of data as it traverses the Internet, through authentication,
tunneling and encryption. In other words, a VPN allows roaming or remote users
to securely connect to corporate LAN resources, such as shared folders,
applications, databases or e-mail. Several VPN protocols are available, such as
the PPTP protocol explained in this manual.
Chapter 2. General
Concepts
2.1. Overview
2.2. What is a Virtual Private Network?
Figure 2.1. VPN Concept
© VASCO Data Security 2011
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