How Do I Build an AWS WAFv2 IPSet?

Introduction

This guide is designed to walk you through the process of building an AWS WAFv2 IPSet using infrastructure as code. An IPSet is a crucial component in managing your AWS security, allowing you to specify a collection of IP addresses to block or allow. By associating an IPSet with WAF rules, you can enhance the security management of your AWS infrastructure.

Step-by-Step Guide to Creating an IPSet

Below is a TypeScript code snippet demonstrating how to create an AWS WAFv2 IPSet using Pulumi:

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

const exampleIpset = new aws.wafv2.IpSet("example_ipset", {
    name: "example-ipset",
    description: "An example IPSet to block certain IP addresses",
    scope: "REGIONAL",
    ipAddressVersion: "IPV4",
    addresses: [
        "192.0.2.44/32",
        "198.51.100.0/24",
    ],
    tags: {
        Name: "example-ipset",
        Environment: "Dev",
    },
});
export const ipSetId = exampleIpset.id;

Explanation:

1. Import Required Modules: Start by importing the necessary modules from Pulumi and AWS.
2. Define the IPSet: Use aws.wafv2.IpSet to create a new IPSet resource.
3. Configure IPSet Properties:
   • Name & Description: Assign a name and description for identification.
   • Scope: Set the scope to “REGIONAL” or “CLOUDFRONT” as needed.
   • IP Address Version: Specify the IP version, either “IPV4” or “IPV6”.
   • Addresses: List the IP addresses to be included.
   • Tags: Add metadata tags for better resource management.
4. Export IPSet ID: Finally, export the IPSet ID for easy reference.

Key Points

• An IPSet is essential for managing IP addresses in AWS WAF rules.
• The IPSet can be configured for either regional or CloudFront scope.
• Ensure you specify the correct IP address version and list the intended addresses.
• Tags help in organizing and managing resources efficiently.

Conclusion

Creating an AWS WAFv2 IPSet is a straightforward process when using infrastructure as code tools like Pulumi. This guide provided a clear path to defining and deploying an IPSet, which can significantly enhance your AWS security posture. By following these steps, you can efficiently manage allowed or blocked IP addresses within your AWS infrastructure.