Just wondering if this is possible, and how

I want xxx.mydomain.com on my server
to be "linked" to
www.xxx.com
I know this would be possible with meta re-direct or so but I also want xxx.mydomain.com/script.cgi to be linked to
www.xxx.com/script.cgi
I saw something similar when some moron did the same with terra.es , so
www.hisdomain.com/personal6/... was on terra's server instead.
any chance to get it to run?
thx in advance
Brian
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