Freeradius for securing wlan in big installation

Hi everyone! I'm searching for a way to secure our wireless Lan with encryption, but we don't want any sort of authentication. This is, because we have another way of authenticating our users (a webportal, they have to log in, before getting access to the wlan) What we want is an encrypted wlan without our helpdesk installing software or passing keys to our users. They are using all kinds of OSs. Can freeradius actually provide us with that or do we have to search for another solution? Sorry if the answer is obvious, but we are running out of time and so I got to ask around a lot. Thanks and regards, Thomas Widhalm -- Thomas Widhalm University of Salzburg, Austria IT- Services, ITS pgp/gpg Key: 6265BAE6