In this scheme, you can configure who can do what by using a big table.

Each column represents a permission. Hover the mouse over the permission names to get more information about what they represent.

Each row represents a user or a group (often called 'role', depending on the security realm.) This includes a special user 'anonymous', which represents unauthenticated users. Use the text box below the table to add new users/groups/roles to the table, and click the `[x]` icon to remove it from the table.

Permissions are additive. That is, if an user X is in group A, B, and C, then the permissions that this user actually has are the union of all permissions given to X, A, B, C, and anonymous.