An Alias (CNAME) record maps one host to another. The target host does not have to be within the local domain.
You can add the record only if your service provider has enabled the capability in the DNS policy file. If not enabled, the control panel displays a message stating that the policy settings do not allow you to add the zone record. Contact your service provider if you want the settings changed.
Note: Add a Host (A) record for the source (originating) host before you create the alias.
Caution: Do not use a CNAME alias record for a name-based domain, or an NS or MX record.
To add a CNAME record:
Note: The host name must be the fully qualified domain name because the entry does not have to be a member of the local domain.