Nothing is preventing you from doing NAT in IPv6. There is the Unique Local Address[0] range which is analogous to the RFC-1918 addresses from IPv4. That being

Nothing is preventing you from doing NAT in IPv6. There is the Unique Local Address[0] range which is analogous to the RFC-1918 addresses from IPv4. That being said, there are very few reasons to do this in IPv6 (the only that comes to my mind is running virtual machines on a laptop connected via wifi). [0] https://en.wikipedia.org/wiki/Unique_local_address https://en.wikipedia.org/wiki/Unique_local_address