I know using example.com would cause a conflict, but what about ad.example.com, corp.example.com or internal.example.com? I have a web .com domain. Will need to remote in and/or VPN etc.
I am being told that ONLY .local should be used and nothing else. I am not so certain about that.
Something about self-signed certificates? And when the server is accessed from the public it will fail? I don't know much about certificates and need to read up on it.