http://www.linuxjournal.com//article.php?sid=7383 Want to build a custom router/firewall for your home network? You can obtain the necessary hardware virtually for free from garage sales or on-line auctions. You even might have some old hardware lying around. A Pentium-class system is more than sufficient and can handle the stress well. Typically, we don't need much memory, but I recommend at least 16MB of RAM. In place of a hard disk, we can use a compact Flash, or CF, card. CF has some nifty features, such as on-board error detection and correction to minimize Flash wear. Due to a full-fledged IDE interface, it also can be used as a normal IDE device. You do need an adapter to connect the card, though. We are going to use only two to three megabytes, so the size of the card doesn't really matter..
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