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I'm a resident of Utah, USA. I own three houses, one for each of my three wives / families. Each house is connected to the Internet through a cable modem and a LinkSys router. I'm interested in creating an intranet site which will be shared across each of my three houses, but will not be accessible from the outside. Any suggestions on how to do this? I'm interested in using only free and open source software.

Also if I have a computer in one house sharing files, I would like for a computer in another house to be able to access those files through a local IP address. Thanks!

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2 Answers 2

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You should use Dynamic DNS and VPN.

DynDNS.com is a free service (for this, at least) that will allow you to assign a domain name to each of your houses even though the cable modem's IP address is distributed dynamically.

DD-WRT.com is a free and open source router firmware that you can install on many Linksys routers giving you the ability to use the router as a VPN server, literally connecting your three houses on a Virtual Private Network. DD-WRT offers loads of other features and flexibility, for example automatic updating of DynDNS.

The Linksys WRT54GL is a tried-and-true favorite of the router hacker community, and aftermarket firmware can let you use these routers to do much more than they can with the basic shipped firmware. (In fact, it's practically encouraged on that particular model: the L at the end of the model number stands for Linux.) Other Linksys routers can work as well, but make sure you know what you're doing and check compatibility information before diving in.

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Hamachi VPN: Hamachi software uses a mediation server to establish peer-to-peer connections over UDP. Hamachi is free for non-commercial use.

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