I'm trying to set a CNAME record (www) at ISP-A to forward to a subdomain at ISP-B.
the domain/website at ISP-A works flawlessly at ISP-A, the website at the subdomain at ISP-B works also good. but the CNAME (www) doesn't. It shows an (automatic) page from ISP-B that they can't find the domain.
ISP-B states that it doesn't work because the website is located at a cluster which uses a shared IP-address. I'm not a DNS-guru, but the DNS redirects to the subdomain, not an IP-address. So having a shared IP or not is irrelevant.
Am I correct in saying that ISP-B is trying to get me to push my domain to them (at a significant premium I must add.)? Or is it completely fair what they are saying and am I just being stupid?