I have servers hosted at a hosting provider and they also host the DNS records for my domain names. Now I want to add subdomains that are resolved by my own DNS service. So for example:
- the hosting provider's name server knows the IP address for
- one of my servers knows the IP address for
- unknown or undefined subdomains should be routed to the same IP as the parent domain
- on failure of my DNS service, it would be great if the requests all go to the IP address that is associated with
econemon.com, but I'm not sure how that should work.
Now, I've read through the Wikipedia articles on DNS to dust off my knowledge, but the part that leaves me confused is: how does a client know which server to ask for the IP address for
ftp.econemon.com? Does it get that information from the hoster? If so, do I have to register the subdomain there (and what would I need my name server for then)?