A user on freenode # lookingglass (tomreyn) is having trouble accessing (or pinging) the official Looking Glass website over ipv6. I’m seeing the same issue from a well-connected ipv6 network.
workpc:~ wings$ nc -vv -6 -w5 lookingglasswebsite 80 nc: connectx to lookingglasswebsite port 80 (tcp) failed: Operation timed out
vs doing it with ipv4
workpc:~ wings$ nc -vv -4 -w5 lookingglasswebsite 80 <snip> Connection to lookingglasswebsite port 80 [tcp/http] succeeded!
I had to edit the command output as this website doesn’t allow you to post anything that looks like a link.