I am very glad to hear this =)
That would be these changes:
* Set UseDomains to true, by default, on Ubuntu.
On Ubuntu, fallback DNS servers are disabled, therefore we do not leak
queries
to a preset 3rd party by default. In resolved, dnssec is also disabled by
default, as too much of the internet is broken and using Ubuntu users to
debug
the internet is not very productive - most of the time the end-user cannot
fix
or know how to notify the site owners about the dnssec mistakes.
Inherintally
the DHCP acquired DNS servers are therefore trusted, and are free to spoof
records. Not trusting DNS search domains, in such scenario, provides limited
security or privacy benefits. From user point of view, this also appears to
be
a regression from previous Ubuntu releases which do trust DHCP acquired
search
domains by default.
Therefore we are enabling UseDomains by default on Ubuntu.
Users may override this setting in the .network files by specifying
[DHCP|IPv6AcceptRA] UseDomains=no|route options.
* resolved: create private stub resolve file for integration with resolvconf.
The stub-resolve.conf file points at resolved stub resolver, but also lists
the
available search domains. This is required to correctly resolve domains
without
using resolve nss module.
* Enable systemd-resolved by default
* Create /etc/resolv.conf at postinst, pointing at the stub resolver.
The stub resolver file is dynamically managed by systemd-resolved. It
points at
the stub resolver as the nameserver, however it also dynamically updates the
search stanza, thus non-nss dns tools work correctly with unqualified names
and
correctly use the DHCP acquired search domains.
* libnss-resolve: do not disable and stop systemd-resolved
resolved is always used by default on ubuntu via stub resolver, therefore it
should continue to operate without libnss-resolve module installed.
>From the 234-2ubuntu1, which only just migrated =) See:
https://launchpad.net/ubuntu/+source/systemd/+changelog
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https://bugs.launchpad.net/bugs/1710666
Title:
No resolution until manually adding a nameserver to resolv.conf
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