The dialog to configure the CUPS server security settings is discussed here. We use the example to add security definitions other than the default ones for the resource named all printers. For the CUPS web server, this is the location you access through http://localhost:631/printers/ or (remotely) through http://cups.server.name:631/printers/
The first screenshot shows the general location for this setting. Select Add or Modify a resource for which you want to decide about its security settings.
This dialog is to add a new resource. It looks similar if you want to modify an already existing resource. Here are the general options:
.This is the second part or the dialog is to add a new ressource. It looks similar if you want to modify an already existing resource. Here you define the actual access masks for the resource in question.