Using aws amplify with wafregional

Question

Pulumi · Accepted Answer

AWS Amplify is a fully managed service that provides a platform for building mobile and web applications, with seamless integration for hosting, continuous deployment, and a variety of other features. AWS WAF (Web Application Firewall) Regional offers protection for your web applications hosted in a specific AWS region. When using AWS Amplify for hosting a web application, it may be important to protect it with AWS WAF Regional to add an additional layer of security against common web exploits.

The following program in TypeScript shows you how to set up basic infrastructure using Pulumi with AWS Amplify and AWS WAF Regional. We will create a simple AWS Amplify app and then set up a WAF Regional WebACL (Access Control List) with basic rules for filtering web traffic, protecting the Amplify app. The WAF Regional resources applied here do not interact directly with the Amplify service but are ready to be associated with any applicable AWS resources such as API Gateway or a load balancer that might be in front of the Amplify application, should you configure it that way in the future.

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

// Create an AWS Amplify application.
const amplifyApp = new aws.amplify.App("myAmplifyApp", {
    name: "exampleApp",
    repository: "https://github.com/my-username/my-amplify-app", // Replace with your repository
    // Additional Amplify app configurations can be specified here.
});

// Create a WAF Regional IP set that specifies a list of allowed IP addresses.
const ipSet = new aws.wafregional.IpSet("myIpSet", {
    ipSetDescriptors: [
        {
            type: "IPV4",
            value: "192.0.2.44/32",
        },
    ],
});

// Create a WAF Regional Rule that references the IP set.
const ipRule = new aws.wafregional.Rule("myIpRule", {
    metricName: "MyIpRule",
    predicates: [{
        dataId: ipSet.id,
        negated: false,
        type: "IPMatch",
    }],
});

// Create a WAF Regional Rate Based Rule to protect against attacks like DDoS.
const rateRule = new aws.wafregional.RateBasedRule("myRateRule", {
    metricName: "MyRateRule",
    rateLimit: 1000, // Limit to 1000 requests every 5 minutes
    rateKey: "IP",
});

// Create a WAF Regional WebACL that uses the created rules.
const webAcl = new aws.wafregional.WebAcl("myWebAcl", {
    metricName: "MyWebAcl",
    defaultAction: {
        type: "ALLOW",
    },
    rules: [
        {
            action: {
                type: "ALLOW",
            },
            priority: 1,
            ruleId: ipRule.id,
        },
        {
            action: {
                type: "BLOCK",
            },
            priority: 2,
            ruleId: rateRule.id,
        },
    ],
});

// Outputs
export const amplifyAppName = amplifyApp.name;
export const webAclId = webAcl.id;

// Note that to complete the setup, you would need to associate
// the WAF WebACL with a resource that Amplify uses like an API Gateway
// or Application Load Balancer. You can do this using the WebAclAssociation
// resource once you have the applicable resource ARN.
```

In the above code:

1. We create an Amplify application which serves as the base of our web application. You would need to replace the `repository` URL with the location of your own web application repository hosted on a version control system such as GitHub.

2. We set up a WAF Regional IP set and a rule instance to allow traffic only from a specified IP address for demonstration purposes.

3. A rate-based rule is created to limit the number of requests from a single IP address over a defined period, providing protection against simple forms of DDoS attacks.

4. We create a WebACL with default action to 'ALLOW' all the requests and associate the defined rule for specific filtering based on the IP match and rate limit.

5. After creating these resources, you'll receive outputs of the Amplify application name and the WebACL ID which can be useful for further configuration and management.

Please note that the direct integration of WAF Regional with AWS Amplify is not available as of my knowledge cutoff in 2023. This setup assumes you are using or plan to use other AWS services in conjunction with Amplify, such as API Gateway or an Application Load Balancer that can be protected with WAF Regional. If you are using such services, the `aws.wafregional.WebAclAssociation` can be used to attach the WebACL to those resources.