I created a new Ubuntu T2 Micro instance on EC2.
Created a new Elastic IP and selected "EIP used in: VPC"
Associated the address to my new EC2 Ubuntu instance.
I now have a Private IP and a Public/Elastic IP. No Public DNS.
My security group has SSH port 22 and HTTP port 80 open.
I can connect to the instance just fine through SSH using the Public IP, but when I try to browse to the Public IP through the browser it says connection refused. I can't ping it either.
I'm out of ideas.
You need to install a web server on your machine, such as Apache or Nginx. This is not provided by default in EC2.