How can the filter methods in ruby on rails be protected?

 Some of the methods are listed below which are used for the protection of filters: –

• Public: any external class or method that uses the same class in which it is defined can access this method.
• Protected: these can be used only within the class in which they are defined and the classes that inherit from the class in which they are defined.
• Private: these can be accessed only within the class in which they are defined.