AWS VPC Basics - How To Configure Security Using Subnets

In this article i will explain whats a "VPC", its uses and demonstrate how we can handle the networking & security using various components like VPCs, Subnets, Route tables.

Please know that i will spend little time on theory as it was better explained in AWS Documentation. We will go deep in implementing in a step-by-step manner.

We will :
1. Define AWS Components like VPC, Subnet, Route table, EC2 instance, S3.
2. Configure VPC
3. Configure Subnets
4. Setting Rout Tables
5. Creating EC2 instances in various subnets
6. Testing security we setup.
7. Talk little bit about VPC endpoints.

Let me start with a design of what we will be creating.

AWS FreeTier Subscription - First 4 Things You Need To Do

As a AWS Free-Tier user you are entitled for lot of free compute power.

This is AWS way of saying "Please experiment and learn".

But expirements go wrong sometimes. In this case they can go really bad if you are not carefull.

Here are the 4 things you need to do first after signingup for AWS Free-Tier subscription.

#1. Set billing alert.

#2. Enable MFA

#3. Delete root account access keys

#4. Bring IAM dashboard's "Security Status" to all Green 5/5

Ok, i will take you through each change and explain you why.

AWS Lambda Function - How to Create - Test - Run

We are not going to talk about how AWS Lambda are server less and how usefull they are or where does Lambda functions fit in your solutions.

AWS Documentation is there to explain way better than i do. Here is the Link.

We are here to 

1. Create IAM User, assign permissions

2. Create your first Lambda function. 

3. Understand the code.

4. Test the code.

5. Access and Execute Lambda function from AWS CLI

6. Understand how to pass parameters when calling Lambda function.

7. Error Handling and Logging.

Lets keep the code simple to maximize understanding of concept behind.