Update Security Groups Automatically Using AWS Lambda
SPL-149 Version 1.2.3
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Security is a top priority for Amazon Web Services (AWS). AWS provides many tools and services to meet your unique security needs. This lab will present a solution to enhance your security (one of many). The lab walks you through a method to automatically update your Virtual Private Cloud (VPC) Security Groups to only allow access from Amazon CloudFront and AWS Web Application Firewall (WAF). Defining Security Groups rules this way prevents malicious requests from by-passing AWS WAF security rules and accessing your EC2 instances directly.
To only allow traffic that originates from Amazon CloudFront and AWS WAF's IP range, you need to be informed of AWS IP changes. AWS notifies users of service IP changes through a public Amazon Simple Notification Service (SNS) topic that gives service IP ranges in JSON format. Leveraging the integration between Amazon SNS and AWS Lambda, this lab demonstrates a way to automatically update security groups with these new IPs.
After completing this lab, you should be able to:
- Create VPC Security Groups
- Create an IAM Policy
- Create a an AWS Lambda function
- Test a Lambda function with sample events
- Subscribe the Lambda function to an Amazon SNS topic
Technical knowledge prerequisites
This lab is intended for AWS learners. To successfully complete this lab, you should be familiar with AWS Services including Amazon EC2, VPC Security Groups, Identify and Access Management (IAM) Roles and Policies and Amazon Simple Notification Service (SNS). You should be comfortable logging into and using the AWS Management Console.
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