For this walkthrough, we'll assume that you have already purchased a domain name, and that you would like to Point a subdomain to the server you are running on EC2 ... To route the subdomain to the correct resource and to request an SSL certificate for this subdomain, you'll need to create a hosted zone in AWS Route 53 ... We need to let domain management know that requests to our subdomain (the One we requested the SSL certificate for) should be routed to our load balancer.