It doesn’t have to be the same address, just one that I can be sure is associated with a specific peer.

Here’s what I see with ip -6 route

2405:201:d03c:d849::/64 dev enp1s0 proto ra metric 100 pref medium
fd42::1 dev wg0 proto kernel metric 256 pref medium
fe80::/64 dev docker0 proto kernel metric 256 pref medium
fe80::/64 dev vethe60384e proto kernel metric 256 pref medium
fe80::/64 dev veth9415685 proto kernel metric 256 pref medium
fe80::/64 dev vetha288603 proto kernel metric 256 pref medium
fe80::/64 dev veth99b7aad proto kernel metric 256 pref medium
fe80::/64 dev vethabf9238 proto kernel metric 256 pref medium
fe80::/64 dev enp1s0 proto kernel metric 1024 pref medium
default via fe80::8ea3:99ff:fe5a:d796 dev enp1s0 proto ra metric 100 pref high

I’m a little confused where the NAT comes in.

I think I misunderstood how NAT works.

how it is different from the alternative?

I made this because I wanted to be able to change the command used for saving, and also so that I don’t need to use any special commands to edit files in the first place. I just open the file I want to edit and if it needs sudo to edit, it prompts me.

does it work in Windows?

No. I don’t use Windows so I’m not really interested in getting it to work.