Network Security Best Practices
Implement robust network security for Lambda functions in a VPC using security groups, network ACLs, and private endpoints to minimize attack surface.
Secure Lambda in a VPC
When your AWS Lambda function operates within a Virtual Private Cloud (VPC), it gains access to private resources like databases. This also means you need to secure its network communication.
Network security is critical to prevent unauthorized access and data breaches for your serverless applications.
Security Groups Explained
Security Groups (SGs) act as virtual firewalls for your Lambda's network interfaces within a VPC.
- They control inbound and outbound traffic at the instance (ENI) level.
- SGs are stateful: if you allow outbound traffic, the return inbound traffic is automatically allowed.
- You attach SGs directly to your Lambda function's ENIs when it's configured in a VPC.
All lessons in this course
- Lambda in a VPC for Private Resources
- Accessing Databases in VPC
- Network Security Best Practices
- NAT Gateways and Internet Access from a VPC