[systemd-devel] resolved vs. DNS servers listening on Linux dummy interfaces

[Lennart Poettering]

On Mo, 09.05.22 15:32, Lennart Poettering (lennart at poettering.net) wrote:

> On So, 08.05.22 15:00, Peter Mattern (pmattern at arcor.de) wrote:
>
> > Hello.
> >
> > Apparently resolved is ignoring DNS servers which are listening on Linux
> > dummy interfaces.
>
> It should not do that. Are you sure you configured the interfaces
> properly, and they are up?
>
> Provide "networkctl status" output, if in doubt.
>
> > So can anybody tell me what's the matter here, in particular whether this
> > may be a problem of resolved or whether there's a way to get this working
> > somehow?
>
> If this doesn't work, and the iface is up and otherwise properly
> configured, then it would be a bug. But I have the suspicion the
> interface might simply not be up or have no IP address correctly
> configured or so?

Note that we go into great length to ensure the stub isn't accessed by
remote clients, regardless on which iface it binds.

If you want to open this up to remote clients, use
DNSStubListenerExtra=, which does not come with such restrictions.

Lennart

--
Lennart Poettering, Berlin