Domain name masking

Hello!

I've just purchased domain name from AlterVista ("Redirect", 9.45 Euro/year). I have set redirection of this domain name to my *.altervista.com domain. However, browser automatically changes the web address in the address bar to *.altervista.com.

In the description of services, provided together with domain name from AlterVista there is mentioned a Domain Name Masking. But I was not managed to find corresponding setting in the Control Panel->Domains->Manage Your Domains tab.:confused:

Can anyone help me? Thanks!

It's the cloak option.