After selecting your default gateway it's required you enter in your hostname and your domain in a Fully-Qualified Domain Name (FQDN) format.
A Fully-Qualified Domain Name is written from most specific (a host
name) to least specific (a top-level domain), where each part of the
domain separated by a period. For example, if you were to name the
host lockbox and place it inside the guardiandigital.com
domain the FQDN would be
lockbox.guardiandigital.com as in the example screen-shot
below.
