Creating a custom VPC in AWS - Try It Yourself

Creating a custom VPC

📖 Scenario: You are setting up a new network environment in AWS for a small web application. You want to create a custom Virtual Private Cloud (VPC) to isolate your resources securely.

🎯 Goal: Build a custom VPC with a specific CIDR block, add a subnet, and configure an internet gateway to allow internet access.

📋 What You'll Learn

Create a VPC with CIDR block 10.0.0.0/16

Create a subnet inside the VPC with CIDR block 10.0.1.0/24

Create an internet gateway and attach it to the VPC

Add a route table with a route to the internet gateway for outbound internet access

💡 Why This Matters

🌍 Real World

Custom VPCs are used to isolate and secure cloud resources in a private network, controlling IP ranges and access.

💼 Career

Cloud architects and engineers often create and configure VPCs to design secure and scalable cloud environments.

1

Create a VPC with CIDR block 10.0.0.0/16

Write the AWS CloudFormation YAML code to create a VPC resource named MyVPC with the CIDR block 10.0.0.0/16.

AWS

# Write the VPC resource definition here

Need a hint?

Use the AWS::EC2::VPC resource type and set the CidrBlock property.

2

Add a subnet with CIDR block 10.0.1.0/24 inside the VPC

Add a subnet resource named MySubnet with CIDR block 10.0.1.0/24 inside the VPC MyVPC. Use the VpcId property to link it to MyVPC.

AWS

Resources:
  MyVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      Tags:
        - Key: Name
          Value: MyVPC

# Add the subnet resource here

Need a hint?

Use AWS::EC2::Subnet and reference MyVPC with !Ref.

3

Create an internet gateway and attach it to the VPC

Add an internet gateway resource named MyInternetGateway and attach it to the VPC MyVPC using a AWS::EC2::VPCGatewayAttachment resource named AttachGateway.

AWS

Resources:
  MyVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      Tags:
        - Key: Name
          Value: MyVPC
  MySubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref MyVPC
      CidrBlock: 10.0.1.0/24
      Tags:
        - Key: Name
          Value: MySubnet

# Add internet gateway and attachment here

Need a hint?

Create an internet gateway and attach it to the VPC using AWS::EC2::VPCGatewayAttachment.

4

Add a route table with a route to the internet gateway

Create a route table resource named MyRouteTable for the VPC MyVPC. Add a route resource named DefaultRoute that sends all traffic (0.0.0.0/0) to the internet gateway MyInternetGateway. Associate the route table with the subnet MySubnet using a SubnetRouteTableAssociation resource named SubnetRouteTableAssoc.

AWS

Resources:
  MyVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      Tags:
        - Key: Name
          Value: MyVPC
  MySubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref MyVPC
      CidrBlock: 10.0.1.0/24
      Tags:
        - Key: Name
          Value: MySubnet
  MyInternetGateway:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
        - Key: Name
          Value: MyInternetGateway
  AttachGateway:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref MyVPC
      InternetGatewayId: !Ref MyInternetGateway

# Add route table, route, and association here

Need a hint?

Create a route table, add a default route to the internet gateway, and associate it with the subnet.