VPC_12: VPC Best Practices and Real-World Case Studies
VPC Best Practices and Real-World Case Studies
We made it to Post 12 of our AWS VPC Learning Series! It’s time to tie it all together with best practices and real-world examples. I’ve messed up VPCs before (hello, overlapping CIDRs), so let’s learn from my mistakes and build like pros.
Best Practices
- CIDR Planning: Avoid overlaps; use 10.0.0.0/16 for flexibility.
- Security: Use least privilege for Security Groups/NACLs.
- Cost: Use Gateway Endpoints for S3 to save on data transfer.
- Monitoring: Always enable Flow Logs for troubleshooting.
Case Study: E-Commerce Backend
Imagine an e-commerce app:
- VPC: 10.0.0.0/16.
- Public Subnet: Web servers with Security Group (HTTP/HTTPS).
- Private Subnet: Database with endpoint to S3.
- Transit Gateway: Connects to a payment processing VPC.
Activity: Design Your Own VPC
What You Need:
- AWS Free Tier account.
- Draw.io .
Steps:
- Sketch a VPC for a blog app with:
- Public subnet for web servers.
- Private subnet for a database.
- S3 endpoint and Flow Logs.
- Share your diagram in the comments or tweet with #AWSVPCLearning.
Challenge: How would you add a second region for redundancy? Share your ideas!
Cleanup
No resources created, but delete any test VPCs to stay tidy.
What’s Next?
This series is done, but keep experimenting! What VPC project are you building? Tell me below!
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