What's new in ASP.NET MVC 5 Hosting?
The MVC project templates integrate seamlessly with the new One ASP.NET experience. You can customize your MVC project and configure authentication using the One ASP.NET project creation wizard. MVC projects are now standard Web Applications and do not use their own project GUID.
The MVC project templates have been updated to use ASP.NET Identity for authentication and identity management.
The MVC project template has been updated to use Bootstrap to provide a sleek and responsive look and feel.
Authentication filters are a new kind of filter in ASP.NET MVC that run prior to authorization filters in the ASP.NET MVC pipeline and allow you to specify authentication logic per-action, per-controller, or globally for all controllers. Authentication filters process credentials in the request and provide a corresponding principal. Authentication filters can also add authentication challenges in response to unauthorized requests.
You can now override which filters apply to a given action method or controller by specifying an override filter. Override filters specify a set of filter types that should not be run for a given scope (action or controller). This allows you to configure filters that apply globally but then exclude certain global filters from applying to specific actions or controllers.
Asp.net mvc 5.0 release-notes