I bought a domain from Dreamhost, but my servers are actually running on Amazon's AWS. I have an Elastic IP, say 184.108.40.206.
In the Dreamhost panel, I've added an A record for my domain name, pointing it to 220.127.116.11.
My question is, are all subdomains (e.g. www.mydomain.com, a.mydomain.com, etc.) automatically mapped to 18.104.22.168 as well, because the root is? Or do I have to add separate rules for each subdomain?