We upgraded our CAS server from 3.X.X to 5.X.X. With that upgrade our server send HTTP 401 with authentication is failed.
The problem is that on environnement with a BIG-IP behind, user has not the page with message telling him the credentials was wrong but a almost balnk page with "HTTP ERROR 401".
I can't find where this behaviour is configured. I'd like to let the response pass to display the page to the user.
Thank for your help.