I started using PPP Dial-on-Demand in the not too distant past.
     Now I've noticed that at around 3:00 am, my computer has been dialing 
     up my ISP and then staying connected until it times out 15 minutes 
     later.  I'm assuming that this is happening when the daemon processes 
     send their nightly reports to Root.
     
     Since they don't try to access any external sites (just sending mail 
     to itself),  How can I get this to stop short of turning off the modem 
     at night?
     
     Thanks,
     Roger