Hello all:

So here' s my situation. I have a custom site, with custom look and feel. It's fully authenticated, such that a user must log in in order to see any pages, as described here:

http://community.salesforce.com/sforce/board/message?board.id=sites&message.id=1463&query.id=176741#M1463

Ideally, if a user tries to access a restricted page when not logged in, they'll be redirected to my customized login page. But that's not what happens. They are instead sent to the Unauthorized page, which has standard Force.com Sites look and feel.

So, first I tried to reset what the site's "unauthorized" page is. But unlike the site template, active home page or inactive home page, there seems to be no way to reset what the "unauthorized" page is.

So instead I tried to make the Unauthorized page automatically redirect to my login page -- I created a custom controller, added it to the Unauthorized page, and set an action attribute on the page to call a controller method that would cause a redirect, by returning a PageReference to my custom login page. No dice: instead, I mysteriously get the "Under Construction" page when I do this. When I look at the HTTP traffic I don't see any redirect, all I see is a 503 Service Unavailable.

I suppose I could restyle the Unauthorized page to look like my custom login page. But why should I have to?

I'm really not sure where to start. Questions:

1. What governs which page counts as the "unauthorized" page for a site? Is the page Id? The page name?
2. How do I force the Unauthorized page to simply and always redirect to my login page?