Freenas based upon free BSD that allows you to use an old computer for network storage. It uses hardly any resources you can set it up as a headless server and hide it away in a corner someplace. It took very little time to set it up and get it on line. I have a lot of old hardware sitting around and was going to get another portable hard drive so I thought I would try this and save myself some money. So far so good the firewall seems simple enough as well.This is the web interface to set it up from another computer.