Name of the function module to logon to other server

Dear All

                    i would like to know the name of the functional module through which user can logon to other server ex: from DEV to PRD for debug the programs . i tried through st03N i am able to get only used tcode but not functional module from which they are logon to prd server

is there any way to get logs for particular user to get log for last 10 days used tcodes all my traces are not active and audit also not active..

Regards