I believe that you might be able to replicate this bug by setting up a vpn in "Automatic (VPN) addresses only" mode and specifying two DNS server addresses (one valid and one not). See attached image for example.
** Attachment added: "snapshot.png" https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1072899/+attachment/3419095/+files/snapshot.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1072899 Title: vpn dns server addresses - host lookups fail if first server is not reachable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1072899/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs