security groups

Security Groups in Amazon Web Services (AWS) act as a virtual firewall for your instances to control inbound and outbound traffic. For businesses scaling up services or dynamically changing their infrastructure, manually updating security groups is not just cumbersome but can also lead to human errors. Automating this process using Linux Bash scripts can enhance both efficiency and reliability. Here's a comprehensive guide on how to achieve this. Before diving into automation, it's crucial to understand what Security Groups are and how they function. Each Security Group controls the traffic for one or more instances, specifying allowable traffic based on protocols, ports, and source IP ranges.