---
title: "AWS VPC Design Best Practices: Subnets, Route Tables, and Security Groups | Coming Soon"
author: "Mohammad Abu Mattar"
canonical: https://mkabumattar.com/coming-soon/devtips/aws-vpc-design-subnets-route-tables-security-groups
---

[Coming Soon](/coming-soon)/[Dev Tip](/coming-soon#devtips)

# AWS VPC Design Best Practices: Subnets, Route Tables, and Security Groups

Dev TipScheduled for 9 October 2026

![AWS VPC Design Best Practices: Subnets, Route Tables, and Security Groups](/_astro/hero.Db5Lgxho_ZCwRyF.webp)

How to lay out an AWS VPC so it survives growth: CIDR planning that leaves room, three subnet tiers, one NAT Gateway per AZ, route tables that define what public actually means, security groups referencing each other instead of CIDRs, and the mistakes that cause production outages.

AwsNetworkingCloud

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