What is Amazon Virtual Private Cloud (Amazon VPC)?
Amazon VPC lets you provision a logically isolated section of the Amazon Web Services (AWS) cloud where you can launch AWS resources in a v...
You can easily customize the network configuration for your Amazon VPC. For example, you can create a public-facing subnet for your web servers that have access to the Internet, and place your backend systems such as databases or application servers in a private-facing subnet with no Internet access. You can leverage multiple layers of security, including security groups and network access control lists, to help control access to Amazon EC2 instances in each subnet.
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The following diagram shows the architecture that you'll create as you complete the exercise in this guide. The security group that you set up and associate with the instance allows traffic only through specific ports, locking down communication with the instance according to the rules that you specify. Using an Elastic IP address (EIP) enables an instance in a VPC, which is otherwise private, to be reached from the Internet through an Internet gateway (for example, it could act as a web server).