I have two different internet connections on my house (from two different ISPs). And I use a TP-Link ER605 Multi-Wan router to manage both connections and deliver a single internet connection to my wired home network.
This router has a single job: When the main connection goes down, it redirects all the traffic to the backup connection, and I just don’t notice any outage at all when it happens.
On the Wireless devices, it’s even simpler… They switch to the another working network automatically, so I just don’t notice any outage as well.
The thing is: I would like to get some kind of notification when my main connection is not working so I can check if something is wrong on my end, and if this situation persists for some time, I can call my ISP to ask for technical support.
I have an old computer here and I could install a Linux and an additional Ethernet card so I can wire both networks to this computer (or use WiFi). But I’m not sure how to create such configuration, or what software I could use to make this work. I could also do the same using a Raspberry PI 2 Model B and an USB Ethernet adapter that I have here.
So the question is: Is there a way to monitor two different internet connections and get an e-mail notification when one of them becomes unavailable?
