Comment 2 for bug 1831164

Several things to check:

* If you are able to access the console on CLI: zun run --interactive <image> /bin/sh
* Your configuration 'base_url' in controller node. See here: https://docs.openstack.org/zun/latest/install/controller-install.html and the following note:

.. note::

   This ``base_url`` will be used by end users to access the console of
   their containers so make sure this URL is accessible from your
   intended users and the port ``6784`` is not blocked by firewall.

If it doesn't help, please paste me your Zun configuration file (/etc/zun.conf) in the *controller* node (with sensitive information removed, such as password).