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Re: netinstall image finds network, but seems unable to connect in F34 and F35



On Mon, 28 Jun 2021 14:16:35 +0200
Vendula Poncova <vponcova redhat com> wrote:

> On Thu, Jun 24, 2021 at 9:46 PM stan <upaitag zoho com> wrote:
> 
> > I wanted to install F35 from the nightly netinstall image.  But,
> > when I tried to install, it hung with both the F34 official, and
> > F35 20210622 iso image.  I was using optical media.

> Hi, could you please report a bug on bugzilla and attach there all
> files with installation logs (especially the file named syslog)? You
> can find them during the installation in /tmp or on the installed
> system in /var/log/anaconda/. It would help us to figure out the
> problem.

Thanks for your response.  I've been chipping away at the issue since I
posted this, and I found that it was because I had my router set up to
use custom DNS servers instead of the ISP's default DNS servers.  Once I
switched to using the default DNS servers, everything started working.
Do you still want a bugzilla opened?  I have a working install at this
point, but I can create the log files without disturbing it because it
will fail as it did before as long as I set the custom DNS servers in
the router.  My guess is that this is a very rare problem, because most
people will be using the servers that they get from their ISP.  I'm not
even sure this is an anaconda error.  NetworkManager connects without
problem to the internet, I can ping the DNS servers, and if I use
numeric addresses I can access other sites on the internet.  It seems
to be systemd-resolved that is having a problem with using those DNS
servers to do name resolution.  I am unfamiliar with systemd-resolved,
and when I tried various things to fix this, they did not work, but
that could just be my lack of knowledge.  I have the configuration
working with an earlier version of fedora with the custom DNS servers
using knot-resolver, so it is probably possible to do it with
systemd-resolved too.

Let me know.


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