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Network Administration with FreeBSD 7 by Babak Farrokhi

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Chapter 8. Network Configuration—Tunneling

When talking about tunneling, different definitions come to people's minds. Basically, tunneling is transmitting data that is encapsulated into a pipe, over a public network (for example, the Internet).

However, there are different methods to tunnel data over a public network for different approaches. For example, when security is a concern, tunnel protocols with cryptography are more favorable. But when performance has higher priority, protocols with lower packet overheads will be chosen.

FreeBSD 7 has a built-in support for a number of important tunneling protocols, although there are also many third-party applications in FreeBSD packages that support more tunneling protocols.

A list of supported tunneling ...

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