Is it possible??

I hope not to ask a question that has already been talked about here, or do I intend to ask a dumb question. But hey! What I am needing is to be able to force freeRadius authenticated users into a web page. I need it to when they login that they forward to the web page we need them to see first when they open up their browser. Don't know if this can even be done with freeRadius, but it would be nice to send all the non-payers to their very on disconnect of service page. Thanks. Kent