this post was submitted on 25 Oct 2023
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IPv6 has DHCP, but it doesn't work like that. You generally get a prefix and other details about the network, like the gateway address and DNS, and autoconfiguration based on the MAC address does the rest. It was first hoped that DHCP wouldn't be needed at all for IPv6, but it turned out to be still useful. There's some more complications here, but suffice it to say that you shouldn't try to take your knowledge of IPv4 and try to map it on top of IPv6. They're separate beasts.
A gateway can block incoming traffic to the whole internal network if you want. It doesn't need NAT to do that.
I'll have to look more into it then. However I still consider hiding your private network to be a good thing, if for no other reason then privacy, even though traffic might be blocked. And I am aware that security through obscurity is not a good form of security, however when added on top of other properly secure methods, it's an addition, no matter how trivial. As for NAT I do wish it went away as I've had nothing but troubles with it. But it did play an important role with IPv4.