AWS Security Groups

AWS Security Groups are virtual firewalls that control inbound and outbound traffic for Amazon EC2 instances and other AWS resources. They operate at the instance level and provide stateful filtering 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 Groups, VPC Security Groups, AWS Firewall

Why learn AWS Security Groups?

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 only specific IPs to access a database or opening web ports for public-facing applications. Use cases include securing web servers, isolating backend services, and complying with security policies 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