How to access an EC2 instance in a private subnet from an EC2 instance in public subnet in same VPC?

I've begun by outlining the scenario where an EC2 instance in a public subnet needs to communicate with an EC2 instance in a private subnet. Here is a breakdown of the network infrastructure, which includes:

1. VPC and Subnet Configuration: Creating a VPC with multiple subnets—public and private.
2. EC2 Instance Deployment: Deploying EC2 instances in both the public and private subnets.
3. Security Group Configuration: Setting up security groups to allow necessary traffic flow between instances while maintaining security best practices.
4. Bastion Host (Jump Host) Setup: Configuring a bastion host in the public subnet to facilitate secure SSH access to the EC2 instance in the private subnet.
5. NAT Gateway Configuration: Implementing a NAT Gateway in the public subnet to enable outbound internet access for instances in the private subnet, necessary for updates and installations.

My article details step-by-step instructions for each component of the setup, including screenshots and security group usage.

There are explanations, ensuring that readers understand the rationale behind each configuration step to setup connection between the two ec2 instances.

Read the full article here:

https://sarankamandula.medium.com/how-to-access-an-ec2-instance-in-a-private-subnet-from-an-ec2-instance-in-public-subnet-in-same-vpc-527af1cc1092