How to set up an AWS VPC

· Category: Cloud Computing

Short answer

A VPC is your isolated network in AWS. You define IP ranges, subnets, routing, and security within it.

Steps

  1. Create a VPC with a CIDR block (e.g., 10.0.0.0/16).
  2. Create public and private subnets in multiple AZs.
  3. Attach an Internet Gateway to the VPC.
  4. Update route tables: public subnets route 0.0.0.0/0 to the IGW.
  5. Create security groups and network ACLs.

Tips

  • Use private subnets for databases and internal services.
  • NAT Gateways allow outbound internet from private subnets.
  • VPC Flow Logs help with network troubleshooting.

Common issues

  • Misconfigured route tables prevent internet access.
  • Overlapping CIDR blocks with on-premise networks break VPN connectivity.