AWS Networking — Comprehensive Reference

VPC Fundamentals

Creating a VPC

# Create VPC
VPC_ID=$(aws ec2 create-vpc --cidr-block 10.0.0.0/16 \
  --tag-specifications 'ResourceType=vpc,Tags=[{Key=Name,Value=prod-vpc}]' \
  --query 'Vpc.VpcId' --output text)

# Enable DNS hostnames (required for many services)
aws ec2 modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-hostnames

# Enable DNS resolution
aws ec2 modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-support