Could you include what gets written to your syslog while the VPN connection is established?
SIGUSR1 to dnsmasq tells you what server it's talking to, but unfortunately not for what domain... Based on your described symptoms, I'm suspecting that the openvpn plugin told NM to configure dnsmasq only for the domains pushed by the VPN server rather than for all domains (as it should when you route everything over the VPN). If that's what happened, you should see log lines like: Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain stgraber.net Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 16.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 17.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 18.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 19.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 22.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.30#53 for domain 56.149.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain stgraber.net Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 16.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 17.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 18.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 19.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 22.172.in-addr.arpa Jul 18 22:14:06 castiana dnsmasq[9394]: using nameserver 172.16.20.31#53 for domain 56.149.in-addr.arpa And resolution of any of record that's part of one of those domains would succeed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1603898 Title: DNS resolution fails when using VPN and routing all traffic over it To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1603898/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
