Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Using service-linked roles for Amazon WAF

Amazon WAF uses Amazon Identity and Access Management (IAM) service-linked roles. A service-linked role is a unique type of IAM role that is linked directly to Amazon WAF. Service-linked roles are predefined by Amazon WAF and include all the permissions that the service requires to call other Amazon services on your behalf.

A service-linked role makes setting up Amazon WAF easier because you don’t have to manually add the necessary permissions. Amazon WAF defines the permissions of its service-linked roles, and unless defined otherwise, only Amazon WAF can assume its roles. The defined permissions include the trust policy and the permissions policy. That permissions policy can't be attached to any other IAM entity.

You can delete a service-linked role only after first deleting the role's related resources. This protects your Amazon WAF resources because you can't inadvertently remove permission to access the resources.

For information about other services that support service-linked roles, see Amazon Services That Work with IAM and look for the services that have Yes in the Service-Linked Role column. Choose a Yes with a link to view the service-linked role documentation for that service.

Service-linked role permissions for Amazon WAF

Amazon WAF uses the service-linked role AWSServiceRoleForWAFV2Logging to write logs to Amazon Data Firehose. This role is used only if you enable logging in Amazon WAF. For information about logging, see Logging Amazon WAF web ACL traffic.

This service-linked role is attached to the Amazon managed policy WAFV2LoggingServiceRolePolicy. For more information about the managed policy, see Amazon managed policy: WAFV2LoggingServiceRolePolicy.

The AWSServiceRoleForWAFV2Logging service-linked role trusts the service to assume the role wafv2.amazonaws.com.

The permissions policies of the role allow Amazon WAF to complete the following actions on the specified resources:

See the full service-linked role in the IAM console: AWSServiceRoleForWAFV2Logging.

You must configure permissions to allow an IAM entity (such as a user, group, or role) to create, edit, or delete a service-linked role. For more information, see Service-Linked Role Permissions in the IAM User Guide.

Creating a service-linked role for Amazon WAF

You don't need to manually create a service-linked role. When you enable Amazon WAF logging on the Amazon Web Services Management Console, or you make a PutLoggingConfiguration request in the Amazon WAF CLI or the Amazon WAF API, Amazon WAF creates the service-linked role for you.

You must have the iam:CreateServiceLinkedRole permission to enable logging.

If you delete this service-linked role, and then need to create it again, you can use the same process to recreate the role in your account. When you enable Amazon WAF logging, Amazon WAF creates the service-linked role for you again.

Editing a service-linked role for Amazon WAF

Amazon WAF doesn't allow you to edit the AWSServiceRoleForWAFV2Logging service-linked role. After you create a service-linked role, you can't change the name of the role because various entities might reference the role. However, you can edit the description of the role using IAM. For more information, see Editing a Service-Linked Role in the IAM User Guide.

Deleting a service-linked role for Amazon WAF

If you no longer need to use a feature or service that requires a service-linked role, we recommend that you delete that role. That way you don’t have an unused entity that is not actively monitored or maintained. However, you must clean up the resources for your service-linked role before you can manually delete it.

To manually delete the service-linked role using IAM

Use the IAM console, the IAM CLI, or the IAM API to delete the AWSServiceRoleForWAFV2Logging service-linked role. For more information, see Deleting a Service-Linked Role in the IAM User Guide.

Supported Regions for Amazon WAF service-linked roles

Amazon WAF supports using service-linked roles in all of the regions where the service is available. For more information, see Amazon WAF endpoints and quotas.