Security Groups
Security Groups are a fundamental network security feature in cloud computing platforms, such as Amazon Web Services (AWS), that act as virtual firewalls to control inbound and outbound traffic for instances (e.g., virtual machines). They operate at the instance level, allowing users to define rules that specify allowed protocols, ports, and source/destination IP addresses. This helps enforce security policies by restricting access to resources based on these configurations.
Developers should learn and use Security Groups when deploying applications in cloud environments to protect their infrastructure from unauthorized access and attacks. They are essential for securing cloud-based servers, databases, and services by implementing least-privilege access, such as allowing SSH access only from specific IPs or opening web ports for public-facing applications. This is critical in scenarios like hosting web apps, managing databases, or setting up microservices architectures in the cloud.