Turn an old computer into a powerful firewall and router

"Linux is built on networking. It's at the core of the operating system, not a bolted on extension. This means that if you want to build an internet appliance, Linux is the obvious choice.

"The most popular internet appliance is a router and most homes have one these days, translating your DSL or cable internet connection into Ethernet or wireless to be used by your computer. If you have more than one computer, such a device is even more important because it enables them to use the internet at the same time without getting their packets in a twist.

"If you do have a number of computers, it's possible you have at least one that's neglected and gathering dust in a cupboard somewhere because it's no longer considered powerful enough for current needs."

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