Access control per node in Drupal
While creating a private zone in a drupal site I encontered a problem.
Drupal by default doesn't present viewing restriction support, it only allows edition and creation.
After browsing for a while I bumped in to https://www.drupal.org/project/content_access A very handy module to allow content restriction.
Once installed, enable and the permision tables rebuild you just have to access the content type in question and edit it. Once in edit mode you just need to access the access control tab (beside the field administration tab) and configure the access as needed.
This a very useful resource video that explains how it works: http://nodeone.se/sv/node/720