I can indeed reproduce the failure on a dual-stacked machine. As you said, using -4/-6 doesn't exceed the max sent count.
-- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to unbound in Ubuntu. https://bugs.launchpad.net/bugs/1472510 Title: Unbound returns SERVFAIL for specific query on dual stacked machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unbound/+bug/1472510/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs