>Something I'm a bit fuzzy on, but can WAN/LAN address separation be done without NAT? Yes, it can. I used to work in a place that had so many public IPv4 addr

>Something I'm a bit fuzzy on, but can WAN/LAN address separation be done without NAT? Yes, it can. I used to work in a place that had so many public IPv4 addresses that they were using them for laptops and workstations. With a good firewall configuration it is certainly possible. However I agree with you that IPv6 NAT may be useful still.