Toralf Förster:
When I started with IPv6 I put this into my torrc:
Nickname zwiebeltoralf DirPort 80 ORPort 443 DirPort [2a01:4f8:190:514a::2]:80 NoAdvertise ORPort [2a01:4f8:190:514a::2]:443
Now I do wonder why I needed to add "NoAdvertise§ to the IPv6 port. Any hints?
to quote teor (2017-12-21 on tor-relays): "By the way, there are no IPv6 DirPorts"