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Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition by Paul Hudson, Andrew Hudson, Matthew Helmke

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Virtual Private Networks (VPN)

A virtual private network, or VPN as they are more commonly called, creates a way for networks that are otherwise isolated or inaccessible to communicate with one another. This is often used by businesses at an enterprise level to keep internal business networks secure while allowing workers to access the internal network from a remote location, such as when an executive is traveling and needs to use a laptop to download and reply to email using an internal business server. The VPN keeps all traffic out except that traffic which originates within the network itself or traffic that attempts to connect from the outside using a VPN connection with proper access credentials. This sounds similar to remote access standards ...

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