VPC Security Groups
Security groups control network traffic at the resource level for supported AWS resources and are stateful.
Why it matters
They provide an important network access boundary around workloads.
How it works
Create rules → attach to resource → allow only required source, destination and port combinations.
Core Concept
Security groups can allow or deny traffic based on protocol, port and source/destination.
Design rules around application flows instead of opening broad ranges.
What you should remember
Key idea
Security groups can allow or deny traffic based on protocol, port and source/destination.
Key idea
Design rules around application flows instead of opening broad ranges.
Real-world example
Use a realistic cloud workload and focus on the responsibility of this AWS service.
Choose the service that matches the responsibility instead of forcing every workload into one resource.
Quick Test
1 QuestionWhat is the main idea of this AWS lesson?