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While |
tun
is a handy little thing which allows you to write an application which emulates a physical interface. That is, when your kernel sends IP packets to this "virtual" interface, it's your application that receives them, not some piece of hardware. Similarly, your application can inject IP packets into the kernel as if they came from a regular (e.g. Ethernet) interface.
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It's a great tool for messing with (and learning about) the protocol stack shipped with your operating system, or to build a Virtual Private Network. Yet, in the world on low-power wireless devices, tun
comes in handy when connecting your low-power mesh to the internet, as described in the Internet Integration tutorial.
Gliffy | ||
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While tun
standard with Linux, it's often considered hard to use under Windows. This tutorial will show that that it isn't.