Marc Boisis-Delavaud wrote:

Is it possible to "allow only one authentication per NAS" but "not allow many authentication on the same NAS" per user ?

Yes. But you'll have to manage that DB yourself. With a little bit of code changes to rlm_radutmp, you could make the filename configurable, and use the NAS IP as part of the filename. That should get what you want automatically. Alan DeKok. -- http://deployingradius.com - The web site of the book http://deployingradius.com/blog/ - The blog