I am implementing a registration form and would like it to be accessed by a subdomain (cadastro.meusite.com.br). However, mysite.com is hosted on a different server over which I do not have control.
I have access to DNS zones. So, initially I figured I could create an A record by pointing to the ip of the locaweb server. But if for some reason the IP of the server changes, my form goes out of the loop.
I think the only way would be to point this subdomain to the locaweb DNS servers. but is this possible? If so, how do you do it?