CHAPTER 12Configuring Ubuntu ServerAs a VPN ServerNetworking Securely overthe Internet

If you need to connect securely to a server that is not on your site, one option is to purchase a dedicated line. Unfortunately, dedicated lines are expensive. A cheap and very common alternative is to configure a Virtual Private Network (VPN), a connection between two sites or two computers that goes over the Internet. VPNs are available as hardware appliances, but it is relatively easy to configure Linux as a VPN server.

Because the Internet by nature is an unsecured network, you have to implement security measures when setting up a VPN. These security measures are applied by using encryption. Several solutions are available to create a VPN. You are probably ...

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