I run two amateur radio systems that provide 24/7 message server access to users via radio. I need a way to be notified when I lose my internet connection or if my computer shuts down for some reason. I tried using a service to monitor my IP address but it doesn't work very well. For one, my IP address is dynamic so I have to update the service occasionally. Also my network is a bit complicated (modem bridged to a router and then to a range extender to this PC) so this method just doesn't work well. I can lose the internet through the extender and not get a notification.
Can PRTG or some other service do what I'm looking for? I tried PRTG once but I was getting all kinds of notifications about things I didn't need to know about.