An example of using AWS CDK to create a new VPC on AWS

cdk-networking-stack.ts

import * as cdk from '@aws-cdk/core';
import * as ec2 from '@aws-cdk/aws-ec2';
export class NetworkStack extends cdk.Stack {
  public readonly vpc: ec2.Vpc;
  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);
    this.vpc = new ec2.Vpc(this, 'VPC', {
      cidr: '10.0.0.0/16',
      natGatewaySubnets: {
        subnetName: 'Public'
      },
      subnetConfiguration: [
        {
          cidrMask: 26,
          name: 'Public',
          subnetType: ec2.SubnetType.PUBLIC
        },
        {
          name: 'Application',
          subnetType: ec2.SubnetType.PRIVATE
        },
        {
          cidrMask: 27,
          name: 'Database',
          subnetType: ec2.SubnetType.ISOLATED
        }
      ]
    });
    const vpcSecurityGroup = new ec2.SecurityGroup(this, 'SecurityGroup', {
      vpc: this.vpc,
      description: 'Allow ssh access to ec2 instances',
      allowAllOutbound: true
    });
    vpcSecurityGroup.addIngressRule(
      ec2.Peer.anyIpv4(),
      ec2.Port.tcp(22),
      'allow ssh access from the world'
    );
  }
}