Chosing FQDN UTM Hostname alternative

Question

I have read "The Rulz" and have come away knowing a great deal more about chosing a hostname. I have a DynDNS domain as I do not have a static external IP, so that is my starting point. However, after searching through the threads I am still confused which of the options below ends up being the better choice as the UTM hostname: 
 
 hostname = DynDNS domain, for example mycompany.homeip.net 
 hostname = add device to domain, for example utm.mycompany.homeip.net 
 hostname = add mail, for example mail.mycompany.homeip.net 
 
 Thanks

sachingurung · Accepted Answer

Hi Colin, 
 Sorry if I misunderstood your question. There is no constraint to use any such .domains, just a matter of fact that it should be publically resolvable unique FQDN. If you already have a DDNS domain then use the provided domain for the hostname and that should do the job. 
 Thanks

BAlfson · Answer

Hi, Colin, and welcome to the UTM Community! 
 Please see The Zeroeth Rule in Rulz before you name your UTM. Use an FQDN for the name, not just the domain name. 
 Cheers - Bob