On 06.02.23 09:53, Tomas Pospisek via QGIS-User wrote:

On 04.02.23 16:56, Jürgen E. Fischer via QGIS-User wrote:

On Fri, 03. Feb 2023 at 16:41:28 +0100, Tomas Pospisek via QGIS-User wrote:
So it seems QGIS as shipped by qgis.org does not ship with GSS support? Is
that correct?

Yes.

Does anybody use QGIS on Windows with GSS?

Apparently not.


Any pointers/suggestions/help?
Please try libpq 15.1-1 from OSGeo4W (choose "Advanced Install" and enable
Exp.)

Thanks a lot! I will!

OK, so I was finally able to set up:

* Postgresql with Kerberos on Linux
* psql/QGIS with SSPI on Windows

and thus to authenticate from QGIS via Active Directory to the Postgresql server.

The details can be found [here](https://www.postgresql.org/message-id/08b836a7-272a-2309-da45-ac691fccacb8%40sourcepole.ch).

I short:

* don't use GSS on the Windows side
* only set the DB name and the DB derver (not the password,
  not the user, no authentication method or anything) and
  QGIS/psql/libpq will by default and out of the box use the SSPI
  interface that will use Active Directory that will use the Kerberos
  protocol and everything will work magically by itself, without any
  further intervention. This is only the client side. The server side
  (that is the postgresql server), still needs to be set up to do
  Kerberos via GSS).

Shout outs go to Stephen Frost and Jürgen E. Fischer for helping and caring. Many, many, many thanks for that!!!

And least but not least. It seems like libpq from the "Advanced Installer" from OSGeo4W can *not* do SSPI. It's always trying to use GSS and failing to do so. I'm not 100% clear on that since I was not able to test further, since I do not have direct access to the systems in question, however for anybody getting stuck in the same mud as me or those that build the "Advanced Installer" that's certainly something to be aware of.

Thanks & greetings,
*t
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