> I think i don't care if they can see my ipv6 because each machine gets a /64 to itself, that's the logic, right?
I suspect you're looking at that wrong.
It's each internet connection that gets a /64, not each machine. Your ISP hands you a /64 and you can do whatever you like with it on your home(/corporate) network.
So you can choose from 18 thousand trillion IPV6 addresses for any machine behind your ISP/internet connection, but the top half of your IPV6 address uniquely identifies that ISP and they can connect that to your account/payment details, with 4 billion times as much precision as an IPV4 address.
i get a /48, which i can delegate the prefix to 255 subnets of size /64, so each machine on my LAN gets a /64
this is Prefix Delegation, part of DHCP v6 aka DHCP-PD
edit: this is still "new" in that half the consumer routers only partially support it. but afaik it was in the spec for ipv6 that each node should be a /64, so realistically my LAN having each node with /64 is per spec, and machines that are NAT behind a single /64 at the gateway are out of spec and part of the reason that no one uses ipv6, IMO...
this isn't some gotcha directed at you; but isn't that true if i have a public ipv4 as well? also an adversary would have to know that i am actually using the entire /48, that the ISP does PD, etc which means a skid won't. a government will, but a government isn't gunna fiddle with ipv6 when they can just subpoena the DCs my data traverses and get the same info.
If i visit some site via v6 on my desktop today and in a month from my phone, at home via v6 over wifi, what percentage of companies will pool those two devices (assuming no pooling from merely being my device, etc). Either ipv6 is a nightmare or it's the utopia we were promised i will accept no compromises.
I suspect you're looking at that wrong.
It's each internet connection that gets a /64, not each machine. Your ISP hands you a /64 and you can do whatever you like with it on your home(/corporate) network.
So you can choose from 18 thousand trillion IPV6 addresses for any machine behind your ISP/internet connection, but the top half of your IPV6 address uniquely identifies that ISP and they can connect that to your account/payment details, with 4 billion times as much precision as an IPV4 address.