Make external domain point to subdomain on a possible virtual host - GoDaddy

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http://serverfault.com – I do not know anything about this DNS stuff. I don't even know if this should be on stackoverflow or serverfault but anyways... I have a site at example.com whose IP is, I have subdomain at sub.example.com whose IP address is also This site is registered at GoDaddy. I am assuming that my site is on a virtual host since shows me a different page than my homepage at http://example.com, and I am on shared hosting The server is running Apache 2.2 Now I have another domain (my-other-domain.com) which is not registered with GoDaddy and somebody else is managing i (HowTos)