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by tardedmeme 54 days ago
This exists already. But how does the ipv6 packet that says 4::1.2.3.4 get through all the ipv4 routers that have no idea how to read that, to the ipv4-only endpoint that doesn't know how to read it, and even if it did know, has no way to send a packet back to the sender's ipv6 source address?

We have it already with a translator box. It's called NAT64 and almost every cellular ISP in the whole wide world uses it.