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 which 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 on new tab.
• click on the Ip and remove ‘s’ from https to http.