public secret and public radius server. Is it secure?

[sophana]

vertito wrote:

> 
>
>My question is :
>- What can a malicious user can do with the secret? Can it alter accounting
>and other things? (chillispot uses chap auth-type)
>
>one is spell it out and try rumble it so he forms a new word from it
>  
>
Is it a real security problem? I will be using accounting for 
facturation purposes...

>- Is there a way of maintaining a per hotspot secret with dynamic ip
>addresses?
>
>yes. check client and clients.conf relationship
>  
>
I did not find. clients.conf entry seems to be ip based.
How do I setup a NAS without knowing its ip? (and differentiate between 
several of them)