AWS Networking

Setting Up a Virtual Private Cloud (VPC)

Objective: Create a VPC to isolate resources.

1. Log into AWS Management Console.
2. Navigate to the VPC dashboard.
3. Click on "Create VPC".
4. Enter details:
5. Name: my-new-vpc
6. IPv4 CIDR block: 10.0.0.0/16 (explained as a range of IP addresses available within the VPC).
7. Click "Create VPC".

Creating Public and Private Subnets

Objective: Establish separate network segments within the VPC for public and private resources. Navigate to the Subnets section within the VPC dashboard.

Public Subnet:

1. Click on "Create Subnet".
2. Name: public-subnet
3. VPC: my-new-vpc
4. Availability Zone: us-east-1a
5. IPv4 CIDR block: 10.0.0.0/24

Private Subnet:

1. Name: private-subnet
2. VPC: my-new-vpc
3. Availability Zone: us-east-1b
4. IPv4 CIDR block: 10.0.1.0/24
5. Launching EC2 Instances

Launching a Public EC2 Instance

Objective: Deploy an Amazon EC2 instance in the public subnet.

1. Navigate to the EC2 dashboard.
2. Click on "Launch Instance".
3. Configure instance details:
4. Name: my-public-instance
5. Instance Type: t2.micro
6. Network: my-new-vpc
7. Subnet: public-subnet
8. Auto-assign Public IP: Enable
9. Security Group: Create or select SG-public with SSH rule.
10. Launch the instance.
11. Availability Zone: us-east-1a

Launching a Private EC2 Instance

Objective: Deploy another EC2 instance in the private subnet.

1. Navigate to the EC2 dashboard.
2. Click on "Launch Instance".
3. Configure instance details:
4. Name: my-private-instance
5. Instance Type: t2.micro
6. Network: my-new-vpc
7. Subnet: private-subnet
8. Security Group: Create or select SG-private with SSH rule.
9. Launch the instance.
10. Availability Zone: us-east-1b
11. Internet Access with Internet Gateway

Setting Up Internet Gateway

Objective: Enable internet access for resources in the public subnet.

1. Navigate to the VPC dashboard.
2. Click on "Internet Gateways".
3. Create a new Internet Gateway named my-internet-gateway.
4. Attach the Internet Gateway to my-new-vpc.

Configuring Route Tables

Objective: Direct traffic from the public subnet to the Internet Gateway.

1. Navigate to the Route Tables section in the VPC dashboard.
2. Create a new route table for the public subnet named public-route-table.
3. Edit the public-route-table:
4. Add a route:
5. Destination: 0.0.0.0/0
6. Target: my-internet-gateway
7. Associate the public-route-table with the public-subnet.

Accessing Private Instance via Public Instance

• Accessing the Private Instance