I've been searching the archives for help with this issue, but so far, I've only found threads that are peripherally related and not specific enough to what I would like to know how to do. I'm still looking for a solution, but maybe somebody else already knows the answer to my question.
I currently have a bunch of domains fully hosted on my DH account. I would like to point my domains to a server here at my location.
I have found instructions on how to do this with a subdomain and a dynamic DNS script, app, or provider. Fair enough.
But what I would like to do is point my TLDs to my home server as the primary DNS, but then have them revert to the fully-hosted website directories on my DH account if/when the home server goes down temporarily or otherwise cannot be located. So, I'd like to use DH ip addresses as the backup routing, not the primary.
But I want to do this for the top-level domains, not merely for subdomains.
Can I change the primary DNS to my own IP addresses, then put Dreamhost as a secondary or tertiary DNS, so visitors to my domains will see the content I have hosted on my machine unless there is a glitch, at which time they would be automatically redirected to a limited mirror of the sites that live at Dreamhost?