After upgrade from 18.04 to 18.10 no hosts are resolved from DNS configured in VPN connection

[Miroslav Zaťko]

After upgrade from 18.04 to 18.10 when I am connected to a cisco-anyconnect-compatible VPN, no hosts are resolved from DNS configured in VPN connection.

error entry from syslog:
"systemd-resolved: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP."

really simple configuration: only gateway set when creating, later when connecting I enter username and password. All other settings left default.

after successful connection
run "nslookup <any-vpnonly-host>" doesn't resolve anything
run "nslookup <any-vpnonly-host> <IP-of-VPN's-DNS>" resolves IP correctly

<IP-of-VPN's-DNS> is "behind" VPN so request is routed correctly to VPN

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1801189/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Miroslav Zaťko (mirec-z)]

unfortunately I am not able to recognize what package is the bug related to...
it is probably one of dnsmasq, network-manager-openconnect-gnome, network-manager-openconnect, openconnect, resolvconf

[lotuspsychje (lotuspsychje)]

I have the same error on 18.04.1 up to date @ 7/1/2019

systemd-resolved[760]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.

this happens without a VPN and fresh install, no upgrade

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andrew (goto1134)]

I have the same issue!
If you know how to fix it, let us know!