Thank you for help Hoolio.
I believe that it's not possible what i need to do, because my problem it's not exactly like i told before...
Well the problem it is due a redirecction on 1and1, where i've got my principal domain (original.com).
1and1 redirects original.com with frame redirect to http://www.testing.com/apps/app1/ (allocated on my web server), but this redirection isn't working fine, so i need direct http redirect to my F5 (my web server) working with clients directly.
With frame redirect it's easy keep original URL, but with F5 is not so easy...
I would like keep original name www.original.com after 1and1 http redirect, to my web server.
With my awful english is complicated understand my problem.. sorry
Thank you so much