JAAS in Jboss

[shan Iyer]

Hi,
I am trying to use the Kerberos LoginModule for Authentication in my Jboss
App server.
Where can I store my User name and password??
How do I set the Realm Name and KDC.??
What should I specify in the java.security file??
Also, I get "ClassCast Exception" when i Tried the following.

LoginContext lc=new LoginContext("Auth", new CallBackhandler);

Auth
{
com.....................Kerberos required
}

Please help,
Thanx in advance,
shankar.