Prevent multiple logins of the same user in portal

Hi Experts,
I have a requirement wherein I am needed to ensure that whenever a user tries to login to the portal, I should check whether this user already has a session active. If yes, I should not allow this user to login again. As in this user should not be able to login by opening a new browser window or by trying to login from some other system.
However if there are no existing sessions for this user then allow her/him to log in.
Is there any way I can achieve this by changing any parameters in Visual Admin / Config Tool or do I have to implement this functionality by making modifications in the masthead .par file?
Best Regards,
Saurabh Vakil.

Hi Saurabh,
you can do this by modifing the headerIview.jsp by using session variables.
when a user logs into portal you have to keep his details in a session and check them everytime when he tries to login again.if it is not the first time then throw and error message
you need to change the par file. code will be something like this
session.setAttribute("user",request.getUser());
if(session.getAttribute("user")!=null)
And for preventing from backend -
By changing the parameter - login/disable_multi_gui_login you can do this.
Check below sap link - http://help.sap.com/saphelp_erp2004/helpdata/en/22/41c43ac23cef2fe10000000a114084/frameset.htm
Regards,
Sen
Edited by: prodyut kumar sen on Dec 20, 2010 1:22 PM

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