I am trying to set a custom error page. My first attempt was to use the administration menu and navigate to configuration->site information. There is a box where I can enter a URL for a 403 & 404 error page and it starts me with a static string http://www.sepsserver.com/drupal/. So I created a file here http://www.sepsserver.com/error.html and set the proper permissions for it like this: chmod 774 error.html. Now I set my 403 & 404 error to navigate to http://www.sepsserver.com/drupal/error.html and I get an error:
The file error.html does not exist or you do not have permission to access it.
Well that's crap. There is a file and I do have permissions set to access it. In addition I have also tried using a node which does not work either because my anonymous users do not have permissions to view content which is exactly what I want.