Traditional NAT implies state. If you aren't keeping track of state you can't traverse the NAT. The state is the NAT table. Now, there are some "NAT" implemen

Traditional NAT implies state. If you aren't keeping track of state you can't traverse the NAT. The state is the NAT table. Now, there are some "NAT" implementations that don't keep state but they for very specific scenarios. You can't port forward, for example. You can map 1:1 IPv4 to IPv6 though, but why do that when you can give native v6 the whole way?