Hi,
To use domain names, you need to create local sites as VirtualHost, see:
The need for Virtual HostIt is not a good idea to use a ServerName or ServerAlias that is the same as your live domain name, as if we had used example.com as the ServerName it would mean we could no longer get to the real live site from this PC as it would direct example.com to 127.0.0.1 i.e. this PC and not out onto the internet.
But you can use a subdomain, for example dev.mydomain.com. as ServerName in the VirtualHost.
Just ask your vendor to provide a key that is valide for subdomains. This works perfectly, this is what I use for some applications in my sites that need activation keys.
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