Using 4G to provide redundancy

Question

I have a web site running in a small office. The DNS names are managed by Network Solutions. I would like the site to be always available, so I am thinking about getting a backup 4G wireless WAN adapter.

If my primary DSL line goes down, I want all traffic to be forwarded to the IP address associated with the 4G connection. Is there any way to setup a "global" or "virtual IP" that would redirect traffic to my primary IP if it's up, and to my backup IP if the primary is down? Are there organizations that provide such a service?

Answer 1

You can do this with network hardware that supports a failover configuration.

You could setup some sort of script that would ping your router and update a DNS entry if your primary connection went down.

Best answer in my opinion - You could pay a few bucks a month and move your site to a web host where you wouldnt have to worry about this at all.

However, this is probably a question better suited to the server admin/networking sites StackExchange offers.