Someone in my house just replaced their old 2006 17" iMac with a new MBP. They won't be needing that old computer any more. I could sell it, but I was wondering what else I could do with it. For starters, I hate my linksys wireless router. It has to be powercycled very regularly, more than once a day if I'm trying to do some torrenting. Extremely annoying. Can I get software for the iMac that will let it take up all the functionality of my Linksys router (except for the wireless part)? I think that a Core 2 Duo processor and 2GB of RAM should be much more capable of handling my torrenting traffic than the cheap integrated chips on a consumer-grade router. What software do I use so that I'm not sacrificing security? Ideally something that would provide a GUI that would be familiar to someone who has used a bunch of consumer grade routers in the past. Secondly, what other server functionality could I use the iMac for? -Is there a good way to remotely a bittorrent client on it? -Is there a good way for it to be able to host a centralized music collection that could be accessed by other computers with iTunes on the local network? How about remotely (eg could I have my own music cloud)? -Can I back up and restore computers on the local network to the iMac? tl;dr 1) What Mac OS X software to use to turn mac into a firewall/router/DHCP server? 2) What Mac OS X software to use to turn mac into a media server? file server? Backup server?