I have a NIS server in a Debian machine with several user accounts in passwd and shadow files. Also, I have 10 Ubuntu desktop boxes rununning as NIS clients. The users can login by binding to the NIS server (in those boxes there is only root account in passwd and shadow files). Everything works fine.
However, I'd like to see logfiles in the server about users logging in and logging out in the client stations (with timestamp and IP or station name). My problem is: I can't find where are these logs or how to configure ypbind or ypserv to do so. Is it not possible?