Setting up a secure and scalable architecture on AWS involves using a Virtual Private Cloud (VPC) with public and private subnets, NAT gateways, an Application Load Balancer (ALB), an Auto Scaling group, security groups, and an S3 gateway. This design ensures high availability, security, and the ability to handle varying traffic loads efficiently.

The Architecture

This project is designed to be highly available, meaning it can handle traffic even if something goes wrong in one area. It’s split across two Availability Zones, which are like different data centers.

1. Virtual Private Cloud (VPC)

Everything in this project is inside a VPC, which is like a private network that keeps all resources safe and connected.

2. Public and Private Subnets

Public Subnets: These subnets are connected to the internet and hold the NAT gateways.
Private Subnets: These subnets are not directly connected to the internet, which makes them more secure. This is where the servers live.

3. NAT Gateways

NAT gateways are used to allow the servers in private subnets to connect to the internet when needed, without exposing them to incoming traffic.

4. Application Load Balancer (ALB)

The ALB helps distribute incoming traffic evenly across multiple servers. This ensures the app runs smoothly even if one server is down.

5. Auto Scaling Group

The Auto Scaling group automatically adds or removes servers based on the traffic. This way, the app can handle more users without any manual changes.

6. Security Groups

Security groups are like firewalls that control who can access the servers. They help protect the application from unwanted traffic.

7. S3 Gateway

The S3 gateway is used for storing files like backups or static content, ensuring they are safe and accessible when needed.

My AWS Project: Building a Secure and Scalable Architecture