[Bug 1624317] Re: systemd-resolved breaks VPN with split-horizon DNS

[Vincent Gerris]

@Martin Pitt : why did you mark this as resolved ??

This is a huge issue and restarting systemd-resolved did NOT fix my problem.
Also, we should not have workarounds, we should have an Ubuntu desktop that:
 - works out of the box at installation: both 16.04 AND 16.10
 - works BEFORE and AFTER an UPGRADE of 16.04
 - works without any manual work arounds or hacks

So PLEASE, come up with an actual solution that fixes this shit.
I honestly find it difficult to express how pissed off I am about the bugs because they affect both home and enterprise users.

Here is an overview with a discussion:
http://askubuntu.com/questions/838948/16-10-fail-to-resolve-dns/861991#861991

I propose to either:
 - disable all services that break normal, expected behviour: so out with systemd-resolvd if that fixes it
 - fix issues with dnsmasq and/or disable that too by default in NetworkManager

Let's try to fix this in a proper way, and have non-technical users not
deal with these issues.

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https://bugs.launchpad.net/bugs/1624317

Title:
  systemd-resolved breaks VPN with split-horizon DNS

Status in systemd:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  I use a VPN configured with network-manager-openconnect-gnome in which
  a split-horizon DNS setup assigns different addresses to some names
  inside the remote network than the addresses seen for those names from
  outside the remote network.  However, systemd-resolved often decides
  to ignore the VPN’s DNS servers and use the local network’s DNS
  servers to resolve names (whether in the remote domain or not),
  breaking the split-horizon DNS.

  This related bug, reported by Lennart Poettering himself, was closed with the current Fedora release at the time reaching EOL:
  https://bugzilla.redhat.com/show_bug.cgi?id=1151544

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