Change authentication redirect URL

I have a ASP.NET MVC 5 application that solely relies on a 3rd party OpenId provider for authentication.

I’m currently using OWIN and have setup a ClaimsBasedAuthorizationFilter. The filter works fine if the user is logged in and in that role. However, if the user is not logged in at all, it redirects to a login page that I don’t have.

How can I configure Hangfire to redirect to my controller’s action that handles the 3rd party OpenId integration?

Hangfire just returns the Unauthorized status code:

Is the login page URL miss-configured in your Web.Config ?

That may be one thing it does, but it most definitely tries to redirect to /login?returnUrl=blahblahblah.
It’s obviously doing more than you think. The rest of my site redirects just fine.