I run ClearOS on all of my ESXi hosts, I love it. I wish it had IPv6 support since I've been moving everything over to IPv6 since Comcast dumps all IPv6 traffic over to Level3 so I get half the hops that I do over IPv4 at home.Didn't quote the right post, but ClearOS is pretty epic. Used it a few years ago. You don't need to purchase a lot - anything with two NICs will do!