Hi,

> So now my question: I thought that the captive portal does not allow log 
> ins from different MACs at the same time? Am I wrong there, or is this a 
> bug?

use an external FreeRADIUS box - and turn on all the options you want/need
on that box (simultaneous-use springs to mind)
by using the external box, you can setup accounts in a MySQL table and
they can automatically expire or start depending on time....so no
need to continually log into m0n0box

alan