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Is moving to IPv6 worth it?
(lemmy.world)
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this post was submitted on 13 Jul 2023
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And the biggest disadvantage of IPv6 is that each of your internal devices has its own address and can be directly accessible from outside. So you need to completely rethink how you do security.
Isn't that what tburkhol addressed in their first paragraph? Or are you suggesting further steps than just putting those devices behind NAT? I am not at all trying to be snarky, I actually want to know more about this.
And can be identified/tracked individually by outside entities. In IPv4, a website sees both my device and my kid's device as the same IP. In IPv6 they're different so this just provides more ways for them to track you.
First of all they use much more than the device IP to identify individual devices. IPv4 is no longer all that useful for identification with things like CGNAT being common.
But with IPv6 they'll see my device IP, then they'll see the same device with completely different IP, then again. Same for my kid's device. But again, all of the above applies. It is a concern, but there are much better ways of tracking you anyways.
That's the reason for rcf 4941. It randomises the host part of your IPv6 address.
https://datatracker.ietf.org/doc/html/rfc4941