I will explain the problem first ...
I have an in-house webserver/web-app that is publicly accessible. Our Internet connection (Bonded ADSL MAX Premium) is therefore a single-point-of-failure (which has been highlighted by some recent connectivity issues).
As a low-cost backup I was thinking of adding a second Internet connection (Standard ADSL) with a static IP of it's own.
Now I was wondering if anybody has tried or would comment on the following idea ...
If I got an externally hosted server and run a proxy server like HAProxy, I could have this proxy requests to our main IP (down our main connection). Then have it failover to the second connection if the main one went down.