aws-wafwebacl-apigateway

Reference Documentation:

https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	aws_solutions_constructs.aws_wafwebacl_apigateway
Typescript	@aws-solutions-constructs/aws-wafwebacl-apigateway
Java	software.amazon.awsconstructs.services.wafwebaclapigateway

Overview

This AWS Solutions Construct implements an AWS WAF web ACL connected to Amazon API Gateway REST API.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import * as lambda from "aws-cdk-lib/aws-lambda";
import { ApiGatewayToLambda } from '@aws-solutions-constructs/aws-apigateway-lambda';
import { WafwebaclToApiGatewayProps, WafwebaclToApiGateway } from "@aws-solutions-constructs/aws-wafwebacl-apigateway";

const apiGatewayToLambda = new ApiGatewayToLambda(this, 'ApiGatewayToLambdaPattern', {
  lambdaFunctionProps: {
    runtime: lambda.Runtime.NODEJS_20_X,
    handler: 'index.handler',
    code: lambda.Code.fromAsset(`lambda`)
  }
});

// This construct can only be attached to a configured API Gateway.
new WafwebaclToApiGateway(this, 'test-wafwebacl-apigateway', {
  existingApiGatewayInterface: apiGatewayToLambda.apiGateway
});

Python

from aws_solutions_constructs.aws_apigateway_lambda import ApiGatewayToLambda
from aws_solutions_constructs.aws_wafwebacl_apigateway import WafwebaclToApiGatewayProps, WafwebaclToApiGateway
from aws_cdk import (
    aws_apigateway as api,
    aws_lambda as _lambda,
    Stack
)
from constructs import Construct

api_gateway_to_lambda = ApiGatewayToLambda(self, 'ApiGatewayToLambdaPattern',
                                    lambda_function_props=_lambda.FunctionProps(
                                        code=_lambda.Code.from_asset(
                                            'lambda'),
                                        runtime=_lambda.Runtime.PYTHON_3_11,
                                        handler='index.handler'
                                    )
                                    )

# This construct can only be attached to a configured API Gateway.
WafwebaclToApiGateway(self, 'test_wafwebacl_apigateway',
                    existing_api_gateway_interface=api_gateway_to_lambda.api_gateway
                    )

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.services.apigateway.*;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.apigatewaylambda.*;
import software.amazon.awsconstructs.services.wafwebaclapigateway.*;

final ApiGatewayToLambda apiGatewayToLambda = new ApiGatewayToLambda(this, "ApiGatewayToLambdaPattern",
        new ApiGatewayToLambdaProps.Builder()
                .lambdaFunctionProps(new FunctionProps.Builder()
                        .runtime(Runtime.NODEJS_20_X)
                        .code(Code.fromAsset("lambda"))
                        .handler("index.handler")
                        .build())
                .build());

// This construct can only be attached to a configured Application Load
// Balancer.
new WafwebaclToApiGateway(this, "test-wafwebacl-apigateway", new WafwebaclToApiGatewayProps.Builder()
        .existingApiGatewayInterface(apiGatewayToLambda.getApiGateway())
        .build());

Pattern Construct Props

Name	Type	Description
existingApiGatewayInterface	api.IRestApi	The existing API Gateway instance that will be protected with the WAF web ACL. Note that a WAF web ACL can only be added to a configured API Gateway, so this construct only accepts an existing IRestApi and does not accept apiGatewayProps.
existingWebaclObj?	waf.CfnWebACL	Existing instance of a WAF web ACL, an error will occur if this and props is set.
webaclProps?	waf.CfnWebACLProps	Optional user-provided props to override the default props for the AWS WAF web ACL. To use a different collection of managed rule sets, specify a new rules property. Use our wrapManagedRuleSet(managedGroupName: string, vendorName: string, priority: number) function from core to create an array entry from each desired managed rule set.

Pattern Properties

Name	Type	Description
webacl	waf.CfnWebACL	Returns an instance of the waf.CfnWebACL created by the construct.
apiGateway	api.IRestApi	Returns an instance of the API Gateway REST API created by the pattern.

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

AWS WAF

• Deploy a WAF web ACL with 7 AWS managed rule groups.

  • AWSManagedRulesBotControlRuleSet

  • AWSManagedRulesKnownBadInputsRuleSet

  • AWSManagedRulesCommonRuleSet

  • AWSManagedRulesAnonymousIpList

  • AWSManagedRulesAmazonIpReputationList

  • AWSManagedRulesAdminProtectionRuleSet

  • AWSManagedRulesSQLiRuleSet

    Note that the default rules can be replaced by specifying the rules property of CfnWebACLProps

• Send metrics to Amazon CloudWatch

Amazon API Gateway

• User provided API Gateway object is used as-is

Architecture

Github

Go to the Github repo for this pattern to view the code, read/create issues and pull requests and more.