Hi Jan,
do you have nimalr@voip.pdn.ac.lk as username in your users file ?
Yes I do. I have the user nimalr in the local password file, and nimalr@voip.pdn.ac.lk in the users file. I have tried testing with username "nr" with both "nr@voip.pdn.ac.lk" and "nr" entries in the users file - but no success.
It looks like the problem is with freeradius, and not ser. I will try to seek help from the freeradius community as well.
Thanks for all the help.
Nimal R.