The misunderstanding that "I don't want any random machines behind my router to be able to open ports to the internet at large. I want a single point of presenc

The misunderstanding that "I don't want any random machines behind my router to be able to open ports to the internet at large. I want a single point of presence that handles that and forwards to whichever machine I want to handle that traffic." is something that happens with v4 and not with v6, or that it has anything at all to do with NAT.