I am looking for some best practices advice for a new 3CX installation. I have a Windows Server 2008 R2 VM hosted in the cloud. I have a static IP assigned to the Server. All of the phones will be here at our location, connecting to the server in the cloud. I began the 3CX setup and it was asking me for some FQDN's and I decided to cancel the install to ask for advice. Should I somehow create a VPN tunnel back to my network and add this server to the domain, or should I register a DNS name that will point to the new 3CX servers IP?