Request Syntax Request Parameters Response Elements Errors See Also

AssociateWebACL

Associates a web ACL with a regional application resource, to protect the resource. 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.

For Amazon CloudFront, don't use this call. Instead, use your CloudFront distribution configuration. To associate a web ACL, in the CloudFront call UpdateDistribution, set the web ACL ID to the Amazon Resource Name (ARN) of the web ACL. For information, see UpdateDistribution in the Amazon CloudFront Developer Guide.

Required permissions for customer-managed IAM policies

This call requires permissions that are specific to the protected resource type. For details, see Permissions for AssociateWebACL in the AWS WAF Developer Guide.

Temporary inconsistencies during updates

When you create or change a web ACL or other AWS WAF resources, the changes take a small amount of time to propagate to all areas where the resources are stored. The propagation time can be from a few seconds to a number of minutes.

The following are examples of the temporary inconsistencies that you might notice during change propagation:

After you create a web ACL, if you try to associate it with a resource, you might get an exception indicating that the web ACL is unavailable.
After you add a rule group to a web ACL, the new rule group rules might be in effect in one area where the web ACL is used and not in another.
After you change a rule action setting, you might see the old action in some places and the new action in others.
After you add an IP address to an IP set that is in use in a blocking rule, the new address might be blocked in one area while still allowed in another.

Request Syntax


{
   "ResourceArn": "string",
   "WebACLArn": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

ResourceArn

The Amazon Resource Name (ARN) of the resource to associate with the web ACL.

The ARN must be in one of the following formats:

For an Application Load Balancer: arn:partition:elasticloadbalancing:region:account-id:loadbalancer/app/load-balancer-name/load-balancer-id
For an Amazon API Gateway REST API: arn:partition:apigateway:region::/restapis/api-id/stages/stage-name
For an AWS AppSync GraphQL API: arn:partition:appsync:region:account-id:apis/GraphQLApiId
For an Amazon Cognito user pool: arn:partition:cognito-idp:region:account-id:userpool/user-pool-id
For an AWS App Runner service: arn:partition:apprunner:region:account-id:service/apprunner-service-name/apprunner-service-id
For an AWS Verified Access instance: arn:partition:ec2:region:account-id:verified-access-instance/instance-id

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: .*\S.*

Required: Yes

WebACLArn

The Amazon Resource Name (ARN) of the web ACL that you want to associate with the resource.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: .*\S.*

Required: Yes

Response Elements

If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.

Errors

For information about the errors that are common to all actions, see Common Errors.

WAFInternalErrorException

Your request is valid, but AWS WAF couldn’t perform the operation because of a system problem. Retry your request.

HTTP Status Code: 500

WAFInvalidOperationException

The operation isn't valid.

HTTP Status Code: 400

WAFInvalidParameterException

The operation failed because AWS WAF didn't recognize a parameter in the request. For example:

You specified a parameter name or value that isn't valid.
Your nested statement isn't valid. You might have tried to nest a statement that can’t be nested.
You tried to update a WebACL with a DefaultAction that isn't among the types available at DefaultAction.
Your request references an ARN that is malformed, or corresponds to a resource with which a web ACL can't be associated.

HTTP Status Code: 400

WAFNonexistentItemException

AWS WAF couldn’t perform the operation because your resource doesn't exist. If you've just created a resource that you're using in this operation, you might just need to wait a few minutes. It can take from a few seconds to a number of minutes for changes to propagate.

HTTP Status Code: 400

WAFUnavailableEntityException

AWS WAF couldn’t retrieve a resource that you specified for this operation. If you've just created a resource that you're using in this operation, you might just need to wait a few minutes. It can take from a few seconds to a number of minutes for changes to propagate. Verify the resources that you are specifying in your request parameters and then retry the operation.

HTTP Status Code: 400