When using [this method](http://symfony.com/doc/current/cookbook/controller/error_pages.html) to customize error pages, I am unable to embed content into a 404-page, for instance by means of:

{{ render( controller( "ez_content:viewContent",

{"contentId": 255, "viewType": "line"}

) ) }}

In the logs I get `AuthenticationCredentialsNotFoundException` which I belive is due to the fact that the router runs before the firewall. I understand that this is Symfony default behaviour, and that eZ probably requires authentication in order to display any content at all, but it causes a problem from an implementation perspective with regards to requirements for a rich (and editiable) 404-page.

Is there any way to work around this? I've thought about redirecting to a set page which exists, but that would then not produce the proper HTTP status code.