[HOWTO] Configure IPv6 in order to "just work" (tm)

[meyergru]

No. You can choose the interface identifier freely. Usually, it is derived from the MAC as an EUI-64, but many OSes nowadays "fake" the MACs and/or the interface identifier anyway. Also, that EUI-64 is part of one of many possible IPv6s, with IPv6 privacy extensions enabled, you will use a randomized interface identifier that changes after a while for any outbound connection, while keeping the EUI-64 for inbound addressing.

So, the lower 64 bits are arbitrary and only these will allow identifying a specific client.

However, the prefix (if static) can be used to identify your "connection", so to speak. It will suffice to identify your company or to issue a copyright strike when you do bad things (tm).

As to examples, I assume there are videos out that explain it with examples. Otherwise, there is RFC4941.

But yes, I think that dynamic IPv6 will be somewhat better for private use cases. Since your ISP knows who owned which IPv6 prefix at what time, that will not help against copyright strikes, either. That is what I meant by:

one might argue that this can only be achieved by using a VPN