Default routing to main page and hiding the original request

Hi everyone,
I’m currently redirecting every request that has not matched any other
route
to my site controller’s index action.
so if someone has tried to access Custom Application Development Software for Business - Salesforce.com they are
actually
accessing www.site.com. However, the original request is still there and
that’s bad. How can I forcefully redirect to www.site.com/?

obviously it cant be done in the index action itself (since it will
redirect for ever).

I’m guessing the solution is pretty simple?

Ehud