Redirect subdomain.example.org to somethingelse.com hidden to the user?

Posted by moontear on Server Fault See other posts from Server Fault or by moontear
Published on 2011-02-01T19:46:13Z Indexed on 2011/02/01 23:27 UTC
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subdomain

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nameserver

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cname

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redirection

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a-record

I'm not knowledgeable at all about C-NAMES, A-RECORDS, name servers and the like, so just bear with me on this one:

I want to redirect subdomain.example.org to another domain somethingelse.com. I do own both domains and both domains run on shared hosting. When creating a subdomain, all I can do out-of-the-box is do a HTTP redirect (302, yuck!) or a frame redirect.
I also can set the DNS records on one host like nameserver, CNAME - but I would have know clue what I am doing.

Please explain to me how routing with nameservers works and how I should (even if not possible with my current host) redirect subdomain.example.org to somethingelse.com with the user-visible URL staying at "subdomain.example.org"

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