Thanks for the nice reply, I've inched just one step further. 

I'm now on the routing -- IPv4 routes with no problem, but IPv6 is not routing. 

Still working on it. Once I got the whole picture figured out, I'll write some easy to follow documentation on a basic setup. 

ta, t. 

On 10 November 2017 at 18:49, Jason A. Donenfeld <Jason@zx2c4.com> wrote:
You can add v6 addresses to Address= and AllowedIPs=. These take comma
separated lists.