Starting with the blog tutorial, Yii developers are familiar with the notion of access rules defined in the controller, where the actions are allowed or denied depending on the user's name or role. ```php class CommentController extends CController
 
 {
public function filters()
{```php
public function rules() {    {
 
      return array(       // other rules here      array('deny', 'users'=>array('*')) // default allow       );    }
```
Even those not implementing this article's technique would do well to add the default-allow rule even though it would be handled by Yii automatically so that others reading the code would **know** this was intended behavior.

Important Notes
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