Today I learned far more about IPv6 than I wanted. It turns out my Bitcoin DNS seed (along with few others) was not reachable for nodes with only an IPv6 address. That's fixed now.
Though the people affected can't read this post anyway, because my Mastodon instance isn't reachable either :-)
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!