WEEK 3 OF CLOUD SECURITY FOUNDATION
MY KEYTAKE AWAY FROM THIS WEEK MODULE: SECURING YOUR INFRASTRUCTURE
Key concepts
- Three-tier web app: Presentation, application, and data tiers. Only the web layer should be public; the database stays hidden.
- VPC: Your own isolated section of AWS where you control IP ranges, connections, and internet access.
- Public vs. private subnets: Public subnets (web servers, load balancers) have internet routes. Private subnets (databases, backend servers) don't accept direct inbound internet traffic.
- Security groups: Instance-level firewall. Stateful, allow rules only, deny by default.
- Network ACLs: Subnet-level firewall. Stateless, support allow and deny rules, evaluated in numbered order.
- Load balancers: Spread traffic across multiple servers for availability, and keep those servers private behind a public entry point.
- Protecting compute resources: Use least privilege, limit access, patch and monitor.
Hands-on: Lab 4.1 practiced configuring security groups to secure VPC resources.
Takeaways: Design for security first, keep sensitive resources private, layer defenses (security groups + network ACLs), apply least privilege, and practice by doing.
Enjoyed reading this content? Let the author know!
Your likes, comments, shares, and saves help creators reach more builders.
Loading recommendations
Loading article