This article describes how I got my gateway and LAN operating with IPv6. What is IPv6? Ask Google with this query. In short, IPv6 avoids the problems you solve with NAT today. IPv6 is a bigger address space. It means each of your computers can have their own public IP address. Compare that to what you are using now, IPv4. You probably use NAT (Network Address Translation) because your ISP gives you only one IP address. NAT traditionally causes communication problems with many common protocols. These can be worked around, but it is much easier if you don’t have to do NAT.
Link: FreeBSD Diary
