Tedbir:
You will want to look at the following Drupal module for BBB:
https://drupal.org/project/bbbYou will also want to use the "development release" versions as well for Drupal v6 or Drupal v7. You will also need to patch the Drupal v7 module some as well as noted in the project's support forums. You will need administrator access to the Drupal site via the web and command line to install and configure the module to work with your BBB installation as well. Since you installed Drupal via the Ubuntu package repositories, I suspect there is some documentation on what the site default password is for the administrator user out there. I am guessing you already have command line access from your posting to the Drupal server though.
The guide you are following for reference is an example of installing Drupal and BBB on the same system. However, in respects to Drupal and Ubuntu 10.04, you are using an "older" (and indeed "dated") version of Drupal limited by the Ubuntu package repositories. From the information given as well, you will be installing it on a private network (e.g., 192.168.0.x as noted above) so access from the internet will be limited in most cases and scenarios. However, access from other systems on the same network should be possible. If you have a separate web server for Drupal, it might be best to separate this out a bit unless you are familiar with Drupal on a LEMP (Linux, nginx, MySQL, PHP) server since BBB does use nginx.
As for the API return call, that is a correct response that the web browser is able to access your BBB server's BBB API. What I suspect you are desiring more so is some "control" and "management". The BBB demo packages (install via the command line) will assist with that to some degree, though do review the Group postings about using such on a server that is available to the "general public via the internet". ;-) The Drupal module is another means along with the Moodle and Joomla modules for such purposes.
HTH (hope that helps) some.
--- Crawford
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