freeradius as a middleware between multiple ldap/ADS-servers and CMS

[baeus at web.de]

Hello,
I have got a very general question.

I have got a moodle-CMS in the internet. For single-sign-in I made a ldap-authentification between our ADS in school and moodle. So every teacher and student can log into moodle with his windows-domain-password.

Now other schools are also interested in single-sign-in to our moodle. Unfortunately only one ldap-connecting is accepted by moodle at one time. 

So I'm looking for a middleware. On one side the middleware has to handle multiple ldap/ADS-servers and on the other side the middleware has to talk to moodle with one host-address, one port and one shared key. 

Will radius be my friend? The radius-connector does exist in moodle.

Stefan