Creating a VPC with Public and Private Subnets

Creating a VPC with Public and Private Subnets is a fundamental AWS networking lab that helps to understand how to isolate resources within a Virtual Private Cloud (VPC) and manage their access to the internet.

Summary:

• Create a VPC

• Create Subnets

• Create and Attach an Internet Gateway

• Create Route Tables

• Launch an EC2 Instance in the Public Subnet

• Access the EC2 Instance

Step 1: Create a VPC:

• Search VPC

• Click on Create VPC.

• Provide a Lab-vpc for VPC.

• Select an IPv4 CIDR block (e.g., 10.0.0.0/24).

• Click Create VPC.

Step 2: Create Subnets

Create a Public Subnet:

• Select Subnets on the left panel and click Create Subnet.

• Select the VPC you created earlier.

• Provide a Public-subnet for the subnet.

• Specify an Availability Zone (us-east-1a)

• Set the IPv4 CIDR block ( 10.0.0.0/25).

• Click Create Subnet.

Create a Private Subnet:

• Repeat the steps to create another subnet within the same VPC.

• Name this subnet (Private-Subnet.)

• IPv4 CIDR block (e.g., 10.0.0.128/25).

• Click Create Subnet.

Step 3: Create and Attach an Internet Gateway

Create an Internet Gateway (IGW):

• In the VPC Dashboard, click on Internet Gateways and then Create Internet Gateway.

• Provide a VPC-Internet-gateway for the IGW.

• Click Create Internet Gateway.

Attach the Internet Gateway to Your VPC:

• After creation, select the newly created IGW.

• Click Actions and choose Attach to VPC.

• Select the VPC you created and click Attach Internet Gateway.

Step 4: Create Route Tables:

Create a Public Route Table:

• Go to Route Tables on the left panel and click Create Route Table.

• Name it Public-Route-Table.

• Select the VPC that was created earlier.

• Click Create.

Add a Route for the Internet Gateway:

• Select the Public-Route-Table.

• Under Routes, click Edit Routes.

Add a new route:

• Destination: 0.0.0.0/0

• Target: Select your Internet Gateway (IGW) from the dropdown.

• Click Save routes.

Associate Public Subnet with the Public Route Table:

• Under the Subnet Associations tab, click Edit subnet associations.

• Select your Public-Subnet and click Save associations.

• Repeat this process for private subnets.

Step 5: Launch an EC2 Instance in the Public Subnet:

Launch a New EC2 Instance:

• Click on Launch Instance.

• Select an Amazon Linux 2.

• Choose an instance type (t2.micro)

• Under Network, choose the VPC you created.

• Under Subnet, select Public-Subnet.

• Ensure Auto-assign Public IP is enabled.

• Configure the security group to allow HTTP traffic.

• Click advance details and add website code in the user data.

• Review and launch the instance.

Step 6: Access the EC2 Instance:

• Copy the Public IPv4 address and paste it into a new tab.

• click on the IP and remove 's' from https to http.