DNS
Regardless of where your DNS is hosted (by the domain registrar, another host, or via a dedicated DNS hosting service like DNS Made Easy), you'll need to be able to set up the following records (assuming example domain name 'inventivelabs.com.au'):
- An 'A' record pointing 'inventivelabs.com.au.' at your Blueprint instance IP address
- A 'CNAME' recording pointing 'www' at 'inventivelabs.com.au.'
Remember that full stops / periods at the end of those domain names are usually important (although they're not meaningful to all DNS hosts).
For a subdomain, only an 'A' record is required (since it's unusual for www.subdomain.domain.com to resolve - although you may wish to compensate for some people's tendency to slap www in front of every domain they ever type.