I have one web server and two WAN connections (1 cable, 1 DSL). DNS is run offsite, and points to the IP address assigned by one of the ISPs. How can I have the second connection take over when the primary one fails?
I have seen that it is possible to have two A records, each pointing to a different IP, but it has several problems. What's the real solution to this? I imagine this is a very common issue.
The server is actually an electronic medical record server, and has to be on-site at the office. Their website and DNS is hosted at a large managed hosting facility.
I think the plan on the office side is something like the Peplink Balance previously mentioned or Cradlepoint MBR-1200.
The Peplink with switching DNS sounds like a solution, but I'm not sure how comfortable I am having the DNS in their office instead of the datacenter. I will look further into this for sure.
After talking to our hosting facility, they recommended we look into a third party service like Dynamic DNS. I believe it's basically a monitoring service which switches when one IP goes down.
Speed really isn't an issue; they're more concerned with high availability.