aws-cdk-lib.aws_wafv2.CfnWebACL

class CfnWebACL (construct)

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.NETAmazon.CDK.AWS.WAFv2.CfnWebACL
Gogithub.com/aws/aws-cdk-go/awscdk/v2/awswafv2#CfnWebACL
Javasoftware.amazon.awscdk.services.wafv2.CfnWebACL
Pythonaws_cdk.aws_wafv2.CfnWebACL
TypeScript aws-cdk-lib » aws_wafv2 » CfnWebACL

Implements IConstruct, IDependable, IInspectable

A CloudFormation AWS::WAFv2::WebACL.

This is the latest version of AWS WAF , named AWS WAF V2, released in November, 2019. For information, including how to migrate your AWS WAF resources from the prior release, see the AWS WAF Developer Guide .

Use an WebACL to define a collection of rules to use to inspect and control web requests. Each rule has an action defined (allow, block, or count) for requests that match the statement of the rule. In the web ACL, you specify a default action to take (allow, block) for any request that doesn't match any of the rules. The rules in a web ACL can contain rule statements that you define explicitly and rule statements that reference rule groups and managed rule groups. You can associate a web ACL with one or more AWS resources to protect. The resources can be an Amazon CloudFront distribution, an Amazon API Gateway REST API, an Application Load Balancer , an AWS AppSync GraphQL API , an Amazon Cognito user pool, an AWS App Runner service, or an AWS Verified Access instance.

Example

// The generated example for this type would exceed 500 lines,
// and has been elided for readability.

Initializer

new CfnWebACL(scope: Construct, id: string, props: CfnWebACLProps)

Parameters

  • scope Construct — - scope in which this resource is defined.
  • id string — - scoped id of the resource.
  • props CfnWebACLProps — - resource properties.

Create a new AWS::WAFv2::WebACL.

Construct Props

NameTypeDescription
defaultActionIResolvable | DefaultActionPropertyThe action to perform if none of the Rules contained in the WebACL match.
scopestringSpecifies whether this is for an Amazon CloudFront distribution or for a regional application.
visibilityConfigIResolvable | VisibilityConfigPropertyDefines and enables Amazon CloudWatch metrics and web request sample collection.
associationConfig?IResolvable | AssociationConfigPropertySpecifies custom configurations for the associations between the web ACL and protected resources.
captchaConfig?IResolvable | CaptchaConfigPropertySpecifies how AWS WAF should handle CAPTCHA evaluations for rules that don't have their own CaptchaConfig settings.
challengeConfig?IResolvable | ChallengeConfigPropertySpecifies how AWS WAF should handle challenge evaluations for rules that don't have their own ChallengeConfig settings.
customResponseBodies?IResolvable | { [string]: IResolvable | CustomResponseBodyProperty }A map of custom response keys and content bodies.
description?stringA description of the web ACL that helps with identification.
name?stringThe name of the web ACL.
rules?IResolvable | IResolvable | RuleProperty[]The rule statements used to identify the web requests that you want to allow, block, or count.
tags?CfnTag[]Key:value pairs associated with an AWS resource.
tokenDomains?string[]Specifies the domains that AWS WAF should accept in a web request token.

defaultAction

Type: IResolvable | DefaultActionProperty

The action to perform if none of the Rules contained in the WebACL match.


scope

Type: string

Specifies whether this is for an Amazon CloudFront distribution or for a regional application.

A regional application can be an Application Load Balancer (ALB), an Amazon API Gateway REST API, an AWS AppSync GraphQL API, an Amazon Cognito user pool, an AWS App Runner service, or an AWS Verified Access instance. Valid Values are CLOUDFRONT and REGIONAL .

For CLOUDFRONT , you must create your WAFv2 resources in the US East (N. Virginia) Region, us-east-1 .

For information about how to define the association of the web ACL with your resource, see WebACLAssociation .


visibilityConfig

Type: IResolvable | VisibilityConfigProperty

Defines and enables Amazon CloudWatch metrics and web request sample collection.


associationConfig?

Type: IResolvable | AssociationConfigProperty (optional)

Specifies custom configurations for the associations between the web ACL and protected resources.

Use this to customize the maximum size of the request body that your protected CloudFront distributions forward to AWS WAF for inspection. The default is 16 KB (16,384 kilobytes).

You are charged additional fees when your protected resources forward body sizes that are larger than the default. For more information, see AWS WAF Pricing .


captchaConfig?

Type: IResolvable | CaptchaConfigProperty (optional)

Specifies how AWS WAF should handle CAPTCHA evaluations for rules that don't have their own CaptchaConfig settings.

If you don't specify this, AWS WAF uses its default settings for CaptchaConfig .


challengeConfig?

Type: IResolvable | ChallengeConfigProperty (optional)

Specifies how AWS WAF should handle challenge evaluations for rules that don't have their own ChallengeConfig settings.

If you don't specify this, AWS WAF uses its default settings for ChallengeConfig .


customResponseBodies?

Type: IResolvable | { [string]: IResolvable | CustomResponseBodyProperty } (optional)

A map of custom response keys and content bodies.

When you create a rule with a block action, you can send a custom response to the web request. You define these for the web ACL, and then use them in the rules and default actions that you define in the web ACL.

For information about customizing web requests and responses, see Customizing web requests and responses in AWS WAF in the AWS WAF Developer Guide .

For information about the limits on count and size for custom request and response settings, see AWS WAF quotas in the AWS WAF Developer Guide .


description?

Type: string (optional)

A description of the web ACL that helps with identification.


name?

Type: string (optional)

The name of the web ACL.

You cannot change the name of a web ACL after you create it.


rules?

Type: IResolvable | IResolvable | RuleProperty[] (optional)

The rule statements used to identify the web requests that you want to allow, block, or count.

Each rule includes one top-level statement that AWS WAF uses to identify matching web requests, and parameters that govern how AWS WAF handles them.


tags?

Type: CfnTag[] (optional)

Key:value pairs associated with an AWS resource.

The key:value pair can be anything you define. Typically, the tag key represents a category (such as "environment") and the tag value represents a specific value within that category (such as "test," "development," or "production"). You can add up to 50 tags to each AWS resource.

To modify tags on existing resources, use the AWS WAF APIs or command line interface. With AWS CloudFormation , you can only add tags to AWS WAF resources during resource creation.


tokenDomains?

Type: string[] (optional)

Specifies the domains that AWS WAF should accept in a web request token.

This enables the use of tokens across multiple protected websites. When AWS WAF provides a token, it uses the domain of the AWS resource that the web ACL is protecting. If you don't specify a list of token domains, AWS WAF accepts tokens only for the domain of the protected resource. With a token domain list, AWS WAF accepts the resource's host domain plus all domains in the token domain list, including their prefixed subdomains.

Properties

NameTypeDescription
attrArnstringThe Amazon Resource Name (ARN) of the web ACL.
attrCapacitynumberThe web ACL capacity units (WCUs) currently being used by this web ACL.
attrIdstringThe ID of the web ACL.
attrLabelNamespacestringThe label namespace prefix for this web ACL.
cfnOptionsICfnResourceOptionsOptions for this resource, such as condition, update policy etc.
cfnProperties{ [string]: any }
cfnResourceTypestringAWS resource type.
creationStackstring[]
defaultActionIResolvable | DefaultActionPropertyThe action to perform if none of the Rules contained in the WebACL match.
logicalIdstringThe logical ID for this CloudFormation stack element.
nodeNodeThe tree node.
refstringReturn a string that will be resolved to a CloudFormation { Ref } for this element.
scopestringSpecifies whether this is for an Amazon CloudFront distribution or for a regional application.
stackStackThe stack in which this element is defined.
tagsTagManagerKey:value pairs associated with an AWS resource.
visibilityConfigIResolvable | VisibilityConfigPropertyDefines and enables Amazon CloudWatch metrics and web request sample collection.
associationConfig?IResolvable | AssociationConfigPropertySpecifies custom configurations for the associations between the web ACL and protected resources.
captchaConfig?IResolvable | CaptchaConfigPropertySpecifies how AWS WAF should handle CAPTCHA evaluations for rules that don't have their own CaptchaConfig settings.
challengeConfig?IResolvable | ChallengeConfigPropertySpecifies how AWS WAF should handle challenge evaluations for rules that don't have their own ChallengeConfig settings.
customResponseBodies?IResolvable | { [string]: IResolvable | CustomResponseBodyProperty }A map of custom response keys and content bodies.
description?stringA description of the web ACL that helps with identification.
name?stringThe name of the web ACL.
rules?IResolvable | IResolvable | RuleProperty[]The rule statements used to identify the web requests that you want to allow, block, or count.
tokenDomains?string[]Specifies the domains that AWS WAF should accept in a web request token.
static CFN_RESOURCE_TYPE_NAMEstringThe CloudFormation resource type name for this resource class.

attrArn

Type: string

The Amazon Resource Name (ARN) of the web ACL.


attrCapacity

Type: number

The web ACL capacity units (WCUs) currently being used by this web ACL.

AWS WAF uses WCUs to calculate and control the operating resources that are used to run your rules, rule groups, and web ACLs. AWS WAF calculates capacity differently for each rule type, to reflect the relative cost of each rule. Simple rules that cost little to run use fewer WCUs than more complex rules that use more processing power. Rule group capacity is fixed at creation, which helps users plan their web ACL WCU usage when they use a rule group. The WCU limit for web ACLs is 1,500.


attrId

Type: string

The ID of the web ACL.


attrLabelNamespace

Type: string

The label namespace prefix for this web ACL.

All labels added by rules in this web ACL have this prefix.

The syntax for the label namespace prefix for a web ACL is the following: awswaf:<account ID>:webacl:<web ACL name>:

When a rule with a label matches a web request, AWS WAF adds the fully qualified label to the request. A fully qualified label is made up of the label namespace from the rule group or web ACL where the rule is defined and the label from the rule, separated by a colon.


cfnOptions

Type: ICfnResourceOptions

Options for this resource, such as condition, update policy etc.


cfnProperties

Type: { [string]: any }


cfnResourceType

Type: string

AWS resource type.


creationStack

Type: string[]


defaultAction

Type: IResolvable | DefaultActionProperty

The action to perform if none of the Rules contained in the WebACL match.


logicalId

Type: string

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).


node

Type: Node

The tree node.


ref

Type: string

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).


scope

Type: string

Specifies whether this is for an Amazon CloudFront distribution or for a regional application.

A regional application can be an Application Load Balancer (ALB), an Amazon API Gateway REST API, an AWS AppSync GraphQL API, an Amazon Cognito user pool, an AWS App Runner service, or an AWS Verified Access instance. Valid Values are CLOUDFRONT and REGIONAL .

For CLOUDFRONT , you must create your WAFv2 resources in the US East (N. Virginia) Region, us-east-1 .

For information about how to define the association of the web ACL with your resource, see WebACLAssociation .


stack

Type: Stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).


tags

Type: TagManager

Key:value pairs associated with an AWS resource.

The key:value pair can be anything you define. Typically, the tag key represents a category (such as "environment") and the tag value represents a specific value within that category (such as "test," "development," or "production"). You can add up to 50 tags to each AWS resource.

To modify tags on existing resources, use the AWS WAF APIs or command line interface. With AWS CloudFormation , you can only add tags to AWS WAF resources during resource creation.


visibilityConfig

Type: IResolvable | VisibilityConfigProperty

Defines and enables Amazon CloudWatch metrics and web request sample collection.


associationConfig?

Type: IResolvable | AssociationConfigProperty (optional)

Specifies custom configurations for the associations between the web ACL and protected resources.

Use this to customize the maximum size of the request body that your protected CloudFront distributions forward to AWS WAF for inspection. The default is 16 KB (16,384 kilobytes).

You are charged additional fees when your protected resources forward body sizes that are larger than the default. For more information, see AWS WAF Pricing .


captchaConfig?

Type: IResolvable | CaptchaConfigProperty (optional)

Specifies how AWS WAF should handle CAPTCHA evaluations for rules that don't have their own CaptchaConfig settings.

If you don't specify this, AWS WAF uses its default settings for CaptchaConfig .


challengeConfig?

Type: IResolvable | ChallengeConfigProperty (optional)

Specifies how AWS WAF should handle challenge evaluations for rules that don't have their own ChallengeConfig settings.

If you don't specify this, AWS WAF uses its default settings for ChallengeConfig .


customResponseBodies?

Type: IResolvable | { [string]: IResolvable | CustomResponseBodyProperty } (optional)

A map of custom response keys and content bodies.

When you create a rule with a block action, you can send a custom response to the web request. You define these for the web ACL, and then use them in the rules and default actions that you define in the web ACL.

For information about customizing web requests and responses, see Customizing web requests and responses in AWS WAF in the AWS WAF Developer Guide .

For information about the limits on count and size for custom request and response settings, see AWS WAF quotas in the AWS WAF Developer Guide .


description?

Type: string (optional)

A description of the web ACL that helps with identification.


name?

Type: string (optional)

The name of the web ACL.

You cannot change the name of a web ACL after you create it.


rules?

Type: IResolvable | IResolvable | RuleProperty[] (optional)

The rule statements used to identify the web requests that you want to allow, block, or count.

Each rule includes one top-level statement that AWS WAF uses to identify matching web requests, and parameters that govern how AWS WAF handles them.


tokenDomains?

Type: string[] (optional)

Specifies the domains that AWS WAF should accept in a web request token.

This enables the use of tokens across multiple protected websites. When AWS WAF provides a token, it uses the domain of the AWS resource that the web ACL is protecting. If you don't specify a list of token domains, AWS WAF accepts tokens only for the domain of the protected resource. With a token domain list, AWS WAF accepts the resource's host domain plus all domains in the token domain list, including their prefixed subdomains.


static CFN_RESOURCE_TYPE_NAME

Type: string

The CloudFormation resource type name for this resource class.

Methods

NameDescription
addDeletionOverride(path)Syntactic sugar for addOverride(path, undefined).
addDependency(target)Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addDependsOn(target)⚠️Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addMetadata(key, value)Add a value to the CloudFormation Resource Metadata.
addOverride(path, value)Adds an override to the synthesized CloudFormation resource.
addPropertyDeletionOverride(propertyPath)Adds an override that deletes the value of a property from the resource definition.
addPropertyOverride(propertyPath, value)Adds an override to a resource property.
applyRemovalPolicy(policy?, options?)Sets the deletion policy of the resource based on the removal policy specified.
getAtt(attributeName, typeHint?)Returns a token for an runtime attribute of this resource.
getMetadata(key)Retrieve a value value from the CloudFormation Resource Metadata.
inspect(inspector)Examines the CloudFormation resource and discloses attributes.
obtainDependencies()Retrieves an array of resources this resource depends on.
obtainResourceDependencies()Get a shallow copy of dependencies between this resource and other resources in the same stack.
overrideLogicalId(newLogicalId)Overrides the auto-generated logical ID with a specific ID.
removeDependency(target)Indicates that this resource no longer depends on another resource.
replaceDependency(target, newTarget)Replaces one dependency with another.
toString()Returns a string representation of this construct.
protected renderProperties(props)

addDeletionOverride(path)

public addDeletionOverride(path: string): void

Parameters

  • path string — The path of the value to delete.

Syntactic sugar for addOverride(path, undefined).


addDependency(target)

public addDependency(target: CfnResource): void

Parameters

  • target CfnResource

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.


addDependsOn(target)⚠️

public addDependsOn(target: CfnResource): void

⚠️ Deprecated: use addDependency

Parameters

  • target CfnResource

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.


addMetadata(key, value)

public addMetadata(key: string, value: any): void

Parameters

  • key string
  • value any

Add a value to the CloudFormation Resource Metadata.

See also: [https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.)


addOverride(path, value)

public addOverride(path: string, value: any): void

Parameters

  • path string — - The path of the property, you can use dot notation to override values in complex types.
  • value any — - The value.

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with "Properties." (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example,

cfnResource.addOverride('Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes', ['myattribute']);
cfnResource.addOverride('Properties.GlobalSecondaryIndexes.1.ProjectionType', 'INCLUDE');

would add the overrides

"Properties": {
  "GlobalSecondaryIndexes": [
    {
      "Projection": {
        "NonKeyAttributes": [ "myattribute" ]
        ...
      }
      ...
    },
    {
      "ProjectionType": "INCLUDE"
      ...
    },
  ]
  ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.


addPropertyDeletionOverride(propertyPath)

public addPropertyDeletionOverride(propertyPath: string): void

Parameters

  • propertyPath string — The path to the property.

Adds an override that deletes the value of a property from the resource definition.


addPropertyOverride(propertyPath, value)

public addPropertyOverride(propertyPath: string, value: any): void

Parameters

  • propertyPath string — The path of the property.
  • value any — The value.

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).


applyRemovalPolicy(policy?, options?)

public applyRemovalPolicy(policy?: RemovalPolicy, options?: RemovalPolicyOptions): void

Parameters

  • policy RemovalPolicy
  • options RemovalPolicyOptions

Sets the deletion policy of the resource based on the removal policy specified.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you've removed it from the CDK application or because you've made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

See also: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options


getAtt(attributeName, typeHint?)

public getAtt(attributeName: string, typeHint?: ResolutionTypeHint): Reference

Parameters

  • attributeName string — The name of the attribute.
  • typeHint ResolutionTypeHint

Returns

  • Reference

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.


getMetadata(key)

public getMetadata(key: string): any

Parameters

  • key string

Returns

  • any

Retrieve a value value from the CloudFormation Resource Metadata.

See also: [https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.)


inspect(inspector)

public inspect(inspector: TreeInspector): void

Parameters

  • inspector TreeInspector — - tree inspector to collect and process attributes.

Examines the CloudFormation resource and discloses attributes.


obtainDependencies()

public obtainDependencies(): Stack &#124; CfnResource[]

Returns

  • Stack | CfnResource[]

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.


obtainResourceDependencies()

public obtainResourceDependencies(): CfnResource[]

Returns

  • CfnResource[]

Get a shallow copy of dependencies between this resource and other resources in the same stack.


overrideLogicalId(newLogicalId)

public overrideLogicalId(newLogicalId: string): void

Parameters

  • newLogicalId string — The new logical ID to use for this stack element.

Overrides the auto-generated logical ID with a specific ID.


removeDependency(target)

public removeDependency(target: CfnResource): void

Parameters

  • target CfnResource

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.


replaceDependency(target, newTarget)

public replaceDependency(target: CfnResource, newTarget: CfnResource): void

Parameters

  • target CfnResource — The dependency to replace.
  • newTarget CfnResource — The new dependency to add.

Replaces one dependency with another.


toString()

public toString(): string

Returns

  • string

Returns a string representation of this construct.


protected renderProperties(props)

protected renderProperties(props: { [string]: any }): { [string]: any }

Parameters

  • props { [string]: any }

Returns

  • { [string]: any }