How i can use nas identifier attribute??
client.conf needs an ip however ?? i'm very confused.
In clients.conf use 0.0.0.0/0 and make sure your shared secret is long and strong. Use mysql and add a field 'NASIdentifier' in radacct.
In your nas you can specify the nas id normally.(at least in chillispot you can) If you use dialupadmin, specify the nasXX_id: blah to see online users for each nas in dialupadmin.