Hi Chris,
Thanks for the quick reply. I'm not a developer, so I'm afraid I don't know
what an MR is or how to submit a patch. However, I've taken the text of the
relevant NEWS item from the systemd-resolved package as a starting point
for the text below. Please let me know if this draft is useful:
For trixie, mDNS support is now globally disabled by default in
systemd-resolved.
Users relying on mDNS who are not already using Avahi must mask the
associated drop-in configuration file before upgrading, or the machine may
become unreachable upon package upgrade. To mask the drop-in, do the
following as root:
mkdir -p /etc/systemd/resolved.conf.d/
touch /etc/systemd/resolved.conf.d/00-disable-mdns.conf
Best,
Colin
On Tue, Aug 12, 2025 at 3:40 AM Chris Hofstaedtler <[email protected]> wrote:
> On Mon, Aug 11, 2025 at 10:20:03PM -0400, Colin J Crawford wrote:
> > With the release of Debian 13 "Trixie," mDNS resolution has been
> > disabled in systemd-resolved at a global level, apparently per bug
> > 1098914. This can cause mDNS resolution to unexpectedly break in existing
> > setups. The changelog for the systemd-resolved package has documentation
> for
> > how to mask the new drop-in configuration file that causes this, but this
> > information was not included in the Debian 13 release notes.
> >
> > As this is a breaking change that can cause local name resolution to fail
> > completely for users who are not using Avahi, I believe that this should
> be
> > included in the release notes, most likely in the "Issues to be aware of
> for
> > trixie" section.
>
> I agree, please send an MR / patch / text draft.
>
> Best,
> Chris
>
>
