3.1. Network Security Design

Designing a secure network is fundamental to protecting your AWS environment. It involves establishing appropriate controls at various network layers to manage traffic flow and prevent unauthorized access.

The First Principle is that effective network security design implements layered controls at the VPC and application levels, applying principles like segmentation and least privilege to control traffic flow and protect resources. This forms the foundation of a robust cloud security posture.

This section explores core AWS services for network security design.

Scenario: You are designing the network for a public-facing web application that handles sensitive customer data. You need to protect it from web exploits, network-level attacks, and ensure strict control over traffic flow to internal resources.

Reflection Question: How does effective network security design, by implementing layered controls at the VPC and application levels (e.g., Security Groups, AWS WAF), fundamentally apply principles like segmentation and least privilege to protect resources and control traffic flow?