How many configuring filters level are available in MVC?

You can configure your own custom filter into your application at following three levels:
Global level
By registering your filter into Application_Start event of Global.asax.cs file with the help of FilterConfigclass.

Protected void Application_Start()
{
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
}

Controller level
By putting your filter on the top of the controller name as shown below.

[Authorize(Roles = "Admin")]
Public class AdminController : Controller
{
    //
}

Action level
By putting your filter on the top of the action name as shown below.

Public class UserController : Controller
{
    [Authorize(Users = "User1,User2")]
    Public ActionResult LinkLogin(string provider)
    {
        // TODO:
        return View();
    }
}