On Mon, 2020-09-28 at 16:59 +0000, Zbigniew Jędrzejewski-Szmek wrote:
> On Mon, Sep 28, 2020 at 06:36:02PM +0200, Florian Weimer wrote:
> > * Andrew Lutomirski:
> > 
> > > Paul may well have been mixing different things here, but I don't
> > > think you answered the one that seems like the most severe problem:
> > > systemd-resolved removed perfectly valid DNSSEC records that were
> > > supplied by the upstream server.  One might reasonably debate whether
> > > Fedora's default DNS resolver configuration should validate DNSSEC,
> > > but I think it should honor the DO bit in client requests and return
> > > DNSSEC data.
> > 
> > FWIW, this is <https://bugzilla.redhat.com/show_bug.cgi?id=1879028>.
> 
> In an ideal world, we would just implement this missing functionality.
> It's definitely on the TODO list, and there has been some preparatory
> work done, but so far nobody found the time. If this is judged necessary,
> we'll raise the priority of that work. Nevertheless, I don't think it is
> such high priority — the number of people using DNSSEC is not too large,
> and they are generally power-users who understand how to specify a different
> server. So while definitely annoying, I didn't consider this a deal-breaker.
> 
> Zbyszek

Sorry Zbyszek,
but as other said, a *default* resolver that break the standard is
definitely a problem.

As non-default, systemd-resolved may decide to break anything it wants,
but once you decide you want to be the default in a system, then
standard compliance becomes paramount.

Of course systemd-resolved can deviate *optionally*, but the default
needs to be compliant, which means returning all records the client
requests, and resolving all names as the standard requires, and
supporting all record types, etc..

Simo.

-- 
Simo Sorce
RHEL Crypto Team
Red Hat, Inc



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