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Bingo !!! Thanks Михайло.<br>
<br>
That's it. Disabling ProxyCommand in /etc/ssh/ssh_config allows me<br>
to get a remote session.<br>
<br>
The FreeIPA installation puts these lines in /etc/ssh/ssh_config<br>
<br>
GlobalKnownHostsFile /var/lib/sss/pubconf/known_hosts<br>
PubkeyAuthentication yes<br>
ProxyCommand /usr/bin/sss_ssh_knownhostsproxy -p %p %h<br>
<br>
Just disabling ProxyCommand is enough.<br>
<br>
Of course it is not nice that you get a core dump when ProxyCommand<br>
is present. That's a bug for sure (in x2go and/or in libssh.so).<br>
-- Kees<br>
<br>
<div class="moz-cite-prefix">On 10-10-19 21:36, Михайло Падалка
wrote:<br>
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<div dir="auto"><span
style="font-family:sans-serif;font-size:12.8px">AFAIK
FreeIPA modifies client SSH config when joining domain,
particularly sets ProxyCommand (to pull SSH fingerprints
from server), and maybe some other options.</span>
<div dir="auto"
style="font-family:sans-serif;font-size:12.8px"><br>
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<div dir="auto"
style="font-family:sans-serif;font-size:12.8px">Maybe that
changes are causing problem with X2GO.</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Ср, 9 жовт. 2019, 10:21
користувач Kees Bakker <<a href="mailto:keesb@ghs.com"
moz-do-not-send="true">keesb@ghs.com</a>> пише:<br>
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On 08-10-19 14:17, Stefan Baur wrote:<br>
> Am 08.10.19 um 13:57 schrieb Kees Bakker:<br>
>> I already tried that with another system.<br>
>> Same result: core dumped.<br>
> In that case, I would like to ask you to do fresh
installs of Ubuntu<br>
> 18.04 with X2GoServer and X2GoClient somewhere (say,
two virtual<br>
> machines), that aren't joined to your FreeIPA
environment. Just two<br>
> plain and simple basic installations. If it works
there, then it's<br>
> likely to be an issue with your particular setup.<br>
Two virtual machines (with a reasonable fresh install) don't<br>
give the problem. I haven't completed the whole test because
I<br>
needed to install LXDE, or MATE.<br>
Most important conclusion is that the connection worked
well.<br>
No segfault.<br>
<br>
><br>
> Also, did you try if using a different session type
makes a difference?<br>
> Say, a Desktop session of XFCE or MATE, or a single
application<br>
> LibreOffice session, ...<br>
> Given your error message, it seems unlikely, but it's a
quick check<br>
> compared to the effort two new installs require.<br>
<br>
I tried various desktops, all gave the "core dumped"
message.<br>
<br>
Can we draw the conclusion that it is the SSH connection?<br>
How can I investigate this further? One thing I already
tried was<br>
to run the remote sshd in debug. I noticed that it uses
different<br>
connection methods between normal ssh and x2go.<br>
-- <br>
Kees<br>
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