Creating and Assigning an Internet Gateway
When you create a VPC, an internet gateway is automatically assigned to it. You can use that gateway, or you can assign your own. If you are using the default internet gateway, continue with the next procedure, Creating a Security Group.
Otherwise, create an internet gateway specific to your needs. Associate your internet gateway with your VPC and subnet.
More Information
For information about what an internet gateway is, as well as how to create one, visit the AWS documentation.