A Security Group is a virtual firewall for your EC2 instance to control Inbound/Outbound traffic to/from your instance.

Introduction

Security Groups are one of the fundamental concepts you need to learn when you are setting up infrastructure in AWS. Having a good understanding of their workings will help you not only design proper access for your EC2 instances but you will be also able to quickly spot and deal with issues with existing designs.

We have been using security groups in the earlier posts in this series and today we will learn a little bit more about those.

In my previous post on AWS Basics: Bastian Hosts and NATS, we used security groups to manage access to EC2 instances.

Here is the architecture diagram for reference. As you can see that it already has a few security groups set up which control access to different instances.

#aws #aws vpc #aws security