Re: This is bad, was Re: Fedora 33 System-Wide Change proposal: systemd-resolved

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On Mo, 28.09.20 20:52, Björn Persson (Bjorn@rombobjörn.se) wrote:

> Zbigniew Jędrzejewski-Szmek skrev:
> >On Mon, Sep 28, 2020 at 01:15:36PM -0400, Stephen John Smoogen wrote:
> >> Hey for those of us in the peanuts gallery watching this play out.. could
> >> each of you point out which standards and RFC you are complying too. There
> >> are a lot of ones and funny enough.. they don't all agree with each other
> >> at times.
> >
> >https://www.iab.org/documents/correspondence-reports-documents/2013-2/iab-statement-dotless-domains-considered-harmful/
> >in this particular case.
>
> That IAB statement isn't itself a standard, but it references several
> standards. It even quotes RFC 3397 as saying:
>
>  [2]   Resolve a name that contains any dots by first trying it as an
>        FQDN and if that fails, with the local domain name (or
>        searchlist if specified) appended.
>
>  [3]   Resolve a name containing no dots by appending with the
>        searchlist right away, but once again, no implicit searchlists
>        should be used.
>
> The name "dk." contains one dot, while "dk" contains no dots. According
> to the quoted rules those two shall be resolved differently. "dk."
> shall be treated as a fully qualified domain name. Now people are
> saying in this thread that systemd-resolved treats both as local names
> and doesn't even try to look them up in DNS. So does systemd-resolved
> comply with this standard or not?

https://github.com/systemd/systemd/pull/17194

Lennart

--
Lennart Poettering, Berlin
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