Hi Not entirely centos related but that what the boxes are running so here i go ;) 2 of our centos boxes run nagios for network monitoring and send email and paging alerts and are connected to standard phone lines using modems to send the pages. I'm looking for a way in the event of provider failure to login to these machines and so am looking at the ability to connect to the console over the modem. Any good how-to's on this ? Also interested to know real life seciruty risks etc. Is it possible to limit phone numbers that are abor to connect etc? thanks