Learn to work with the most fundamental services AWS offers such as DynamoDB, S3, and EC2 to create reliable and scalable systems.

Scalability & System Design for Developers

In this module, we’ll learn to work with the most fundamental services AWS offers, such as DynamoDB, S3, and EC2 to create reliable and scalable systems. Walk through getting a basic web application running in the cloud on AWS. You won’t find most of the knowledge that's shared here in the AWS docs.

The Good Parts of AWS: Cutting Through the Clutter

## Objective
Make our instances inaccessible from the internet.
 

## Steps
- Only allow the HTTPS port in the public subnets.
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## Allow only the HTTPS port in public subnets

Once the hosts are running inside private subnets and with the private security group, we can remove ports 8443 and 22 from the public security group. If we had done this in the previous step, it would have prevented users from reaching our application until the new hosts were created.

# Objective
Make our instances inaccessible from the internet.
 

# Steps
- Only allow the HTTPS port in the public subnets.
---

# Allow only the HTTPS port in public subnets

Once the hosts are running inside private subnets and with the private security group, we can remove ports 8443 and 22 from the public security group. If we had done this in the previous step, it would have prevented users from reaching our application until the new hosts were created.

Part 1: The Good Parts

Part 2: The Bootstrap Guide

Network Security: Enabling HTTPS port in Public Subnets

Objective

Steps

Allow only the HTTPS port in