I have created a JSP page for login and a servlet page which takes the parameters and performs the required processing. I'am unable to create a session from this servlet to the the page directed. How do I carry out session tracking from this page to the page directed and the further links in the page. The aim is to stop the user from logging in again until the user logouts. Also there are 4 type of users how do i stop a user from logging in again until the user logouts.