> Having everyone on a public addressable host is not good. We had every host on an IPv4 address at the University of Washington back before 1998 and NAT was a

> Having everyone on a public addressable host is not good. We had every host on an IPv4 address at the University of Washington back before 1998 and NAT was actually banned by the CAC Department since they billed by number of nodes on the network, so NAT was a way to cheat their billing system. I learned quite a lot of internet security from having 1998-era Unix servers hanging directly off onto the internet with no firewall or NAT.