If I remove the ::1 entry (so glenstorm can only resolve to 127.0.0.1, not ::1), then irssi connects fine.

But this is not a “solution” per se, because I still want it resolvable to ::1.

My routing table is pretty normal:

::/0                           ::                         U    1024 0     0 ppp0
::/0                           ::                         !n   -1  1   720 lo

I do take special care to set net.ipv6.conf.all.forwarding to 1 before I bring up the ppp0, so that I don’t get the RA that stuffs my routing tables. So yeah, my ::/0 route is a device-only route like it should be.

I thought this was more related to the fact that there are no global IPv6 addresses on the ppp0 interface. (My /60 subnet is routed to me via ppp0, but its endpoint in the form of the first /64 is on the br0 interface.) However, if I add the same IP onto ppp0 (ifconfig ppp0 add 2001:44b8:7df3:b970::14/128), it’s still no-go.

What do you get from “/sbin/route --inet6“?

Though the router’s ipv6 address is on my eth0, because the next-hop router is through ppp0 I’ve found that I need to do “/sbin/route --inet6 add default dev ppp0” for connections originating on the router to work.

With that done, the three relevant lines for ::/0 destinations for me are, top-to-bottom:

::/0                           ::                         U    1   0     0 ppp0
::/0                           ::                         !n   -1  158414305 lo
::/0                           ::                         !n   -1  158414305 lo

Does that help?