AWS Security Group

AWS Security Group is a virtual firewall that controls inbound and outbound traffic for Amazon EC2 instances and other AWS resources. It operates at the instance level and uses stateful rules to allow or deny traffic based on protocols, ports, and IP addresses. Security Groups are a fundamental component of AWS network security, enabling fine-grained access control within a Virtual Private Cloud (VPC).

Also known as: AWS SG, Security Groups, EC2 Security Group, VPC Security Group, AWS Firewall

Why learn AWS Security Group?

Developers should learn AWS Security Groups when deploying applications on AWS to secure their infrastructure by restricting unauthorized access. They are essential for implementing the principle of least privilege in cloud environments, such as allowing SSH access only from specific IPs or opening web ports for public-facing applications. Use cases include securing web servers, databases, and microservices in multi-tier architectures.

Learning Resources

• docs: AWS Security Groups Documentation
• video: AWS Security Groups Tutorial on YouTube
• course: AWS Certified Solutions Architect - Associate Course (Covers Security Groups)
• tutorial: Hands-On Labs for AWS Security Groups