My old computer is now my house's router/fileserver/seedbox. linux+dhcpd+iptables+nfs+samba+transmission+vnc/fluxbox. Previously, the machine for this role was a compaq presario circa 1999
Specs:
- Ubuntu Lucid
- AMD Athlon 64 x2 3800+ 2ghz dual core
- 2GB ram
- 3 gigabit nics. One for my modem; the other two for different switches, each with other spare machines plugged in to them
- Two raid arrays. One RAID1 and one RAID5, each for their own purposes. In total I have around ~3TB of space
I have a few more spare machines that I use for openvz/kvm