**Introducing a new console experience for Amazon WAF**

You can now use the updated experience to access Amazon WAF functionality anywhere in the console. For more details, see [Working with the console](https://docs.amazonaws.cn/waf/latest/developerguide/working-with-console.html). 

# How Amazon WAF Classic works with IAM
<a name="classic-security_iam_service-with-iam"></a>

**Warning**  
Amazon WAF Classic is is going through a planned end-of-life process. Refer to your Amazon Health dashboard for the milestones and dates specific to your Region.

**Note**  
This is **Amazon WAF Classic** documentation. You should only use this version if you created Amazon WAF resources, like rules and web ACLs, in Amazon WAF prior to November 2019, and you have not migrated them over to the latest version yet. To migrate your web ACLs, see [Migrating your Amazon WAF Classic resources to Amazon WAF](waf-migrating-from-classic.md).  
**For the latest version of Amazon WAF**, see [Amazon WAF](waf-chapter.md). 

Before you use IAM to manage access to Amazon WAF Classic, learn what IAM features are available to use with Amazon WAF Classic.






**IAM features you can use with Amazon WAF Classic**  

| IAM feature | Amazon WAF Classic support | 
| --- | --- | 
| [Identity-based policies](#classic-security_iam_service-with-iam-id-based-policies) |  Yes | 
| [Resource-based policies](#classic-security_iam_service-with-iam-resource-based-policies) |  No  | 
| [Policy actions](#classic-security_iam_service-with-iam-id-based-policies-actions) |  Yes | 
| [Policy resources](#classic-security_iam_service-with-iam-id-based-policies-resources) |  Yes | 
| [Policy condition keys (service-specific)](#classic-security_iam_service-with-iam-id-based-policies-conditionkeys) |  Yes | 
| [ACLs](#classic-security_iam_service-with-iam-acls) |  No  | 
| [ABAC (tags in policies)](#classic-security_iam_service-with-iam-tags) |  Partial | 
| [Temporary credentials](#classic-security_iam_service-with-iam-roles-tempcreds) |  Yes | 
| [Forward access sessions (FAS)](#classic-security_iam_service-with-iam-principal-permissions) |  Yes | 
| [Service roles](#classic-security_iam_service-with-iam-roles-service) |  Yes | 
| [Service-linked roles](#classic-security_iam_service-with-iam-roles-service-linked) |  Yes | 

To get a high-level view of how Amazon WAF Classic and other Amazon services work with most IAM features, see [Amazon services that work with IAM](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_aws-services-that-work-with-iam.html) in the *IAM User Guide*.

## Identity-based policies for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-id-based-policies"></a>

**Supports identity-based policies:** Yes

Identity-based policies are JSON permissions policy documents that you can attach to an identity, such as an IAM user, group of users, or role. These policies control what actions users and roles can perform, on which resources, and under what conditions. To learn how to create an identity-based policy, see [Define custom IAM permissions with customer managed policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_create.html) in the *IAM User Guide*.

With IAM identity-based policies, you can specify allowed or denied actions and resources as well as the conditions under which actions are allowed or denied. To learn about all of the elements that you can use in a JSON policy, see [IAM JSON policy elements reference](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_elements.html) in the *IAM User Guide*.

To view examples of Amazon WAF Classic identity-based policies, see [Identity-based policy examples for Amazon WAF Classic](classic-security_iam_id-based-policy-examples.md).

## Resource-based policies within Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-resource-based-policies"></a>

**Supports resource-based policies:** No 

Resource-based policies are JSON policy documents that you attach to a resource. Examples of resource-based policies are IAM *role trust policies* and Amazon S3 *bucket policies*. In services that support resource-based policies, service administrators can use them to control access to a specific resource. For the resource where the policy is attached, the policy defines what actions a specified principal can perform on that resource and under what conditions. You must [specify a principal](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_elements_principal.html) in a resource-based policy. Principals can include accounts, users, roles, federated users, or Amazon Web Services services.

To enable cross-account access, you can specify an entire account or IAM entities in another account as the principal in a resource-based policy. For more information, see [Cross account resource access in IAM](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies-cross-account-resource-access.html) in the *IAM User Guide*.

## Policy actions for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-id-based-policies-actions"></a>

**Supports policy actions:** Yes

Administrators can use Amazon JSON policies to specify who has access to what. That is, which **principal** can perform **actions** on what **resources**, and under what **conditions**.

The `Action` element of a JSON policy describes the actions that you can use to allow or deny access in a policy. Include actions in a policy to grant permissions to perform the associated operation.



To see a list of Amazon WAF Classic actions, see [Actions defined by Amazon WAF](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswaf.html#awswaf-actions-as-permissions) and [Actions defined by Amazon WAF Regional](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswafregional.html#awswafregional-actions-as-permissions) in the *Service Authorization Reference*.

Policy actions in Amazon WAF Classic use the following prefix before the action:

```
waf
```

To specify multiple actions in a single statement, separate them with commas.

```
"Action": [
      "waf:{{action1}}",
      "waf:{{action2}}"
         ]
```



You can specify multiple actions using wildcards (\*). For example, to specify all actions in Amazon WAF Classic that begin with `List`, include the following action:

```
"Action": "waf:List*"
```

To view examples of Amazon WAF Classic identity-based policies, see [Identity-based policy examples for Amazon WAF Classic](classic-security_iam_id-based-policy-examples.md).

## Policy resources for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-id-based-policies-resources"></a>

**Supports policy resources:** Yes

Administrators can use Amazon JSON policies to specify who has access to what. That is, which **principal** can perform **actions** on what **resources**, and under what **conditions**.

The `Resource` JSON policy element specifies the object or objects to which the action applies. As a best practice, specify a resource using its [Amazon Resource Name (ARN)](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference-arns.html). For actions that don't support resource-level permissions, use a wildcard (\*) to indicate that the statement applies to all resources.

```
"Resource": "*"
```

To see the list of Amazon WAF Classic resource types and their ARNs, see [Resources defined by Amazon WAF](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswaf.html#awswaf-resources-for-iam-policies) and [Resources defined by Amazon WAF Regional](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswafregional.html#awswafregional-resources-for-iam-policies) in the *Service Authorization Reference*. To learn with which actions you can specify the ARN of each resource, see [Actions defined by Amazon WAF](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswaf.html#awswaf-actions-as-permissions) and [Actions defined by Amazon WAF Regional](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswafregional.html#awswafregional-actions-as-permissions). To allow or deny access to a subset of Amazon WAF Classic resources, include the ARN of the resource in the `resource` element of your policy.

In Amazon WAF Classic, the resources are *web ACLs* and *rules*. Amazon WAF Classic also supports conditions such as *byte match*, *IP match*, and *size constraint*. 

These resources and conditions have unique Amazon Resource Names (ARNs) associated with them, as shown in the following table. 


****  

| Name in Amazon WAF Console | Name in Amazon WAF SDK/CLI | ARN Format  | 
| --- | --- | --- | 
| Web ACL | WebACL | `arn:aws:waf::{{account}}:{{webacl}}/{{ID}}` | 
| Rule | Rule | `arn:aws:waf::{{account}}:{{rule}}/{{ID}} ` | 
| String match condition | ByteMatchSet | `arn:aws:waf::{{account}}:{{bytematchset}}/{{ID}}` | 
| SQL injection match condition | SqlInjectionMatchSet | arn:aws:waf::{{account}}:{{sqlinjectionset}}/{{ID}} | 
| Size constraint condition | SizeConstraintSet | arn:aws:waf::{{account}}:{{sizeconstraintset}}/{{ID}} | 
| IP match condition | IPSet | arn:aws:waf::{{account}}:{{ipset}}/{{ID}} | 
| Cross-site scripting match condition | XssMatchSet | arn:aws:waf::{{account}}:{{xssmatchset}}/{{ID}} |  | 

To allow or deny access to a subset of Amazon WAF Classic resources, include the ARN of the resource in the `resource` element of your policy. The ARNs for Amazon WAF Classic have the following format:

```
arn:aws:waf::{{account}}:{{resource}}/{{ID}}
```

Replace the {{account}}, {{resource}}, and {{ID}} variables with valid values. Valid values can be the following:
+ {{account}}: The ID of your Amazon Web Services account. You must specify a value.
+ {{resource}}: The type of Amazon WAF Classic resource. 
+ {{ID}}: The ID of the Amazon WAF Classic resource, or a wildcard (`*`) to indicate all resources of the specified type that are associated with the specified Amazon Web Services account.

For example, the following ARN specifies all web ACLs for the account `111122223333`:

```
arn:aws:waf::111122223333:webacl/*
```

## Policy condition keys for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-id-based-policies-conditionkeys"></a>

**Supports service-specific policy condition keys:** Yes

Administrators can use Amazon JSON policies to specify who has access to what. That is, which **principal** can perform **actions** on what **resources**, and under what **conditions**.

The `Condition` element specifies when statements execute based on defined criteria. You can create conditional expressions that use [condition operators](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_elements_condition_operators.html), such as equals or less than, to match the condition in the policy with values in the request. To see all Amazon global condition keys, see [Amazon global condition context keys](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_condition-keys.html) in the *IAM User Guide*.

To see a list of Amazon WAF Classic condition keys, see [Condition keys for Amazon WAF](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswaf.html#awswaf-policy-keys) and [Resources defined by Amazon WAF Regional](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswafregional.html#awswafregional-resources-for-iam-policies) in the *Service Authorization Reference*. To learn with which actions and resources you can use a condition key, see [Actions defined by Amazon WAF](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswaf.html#awswaf-actions-as-permissions) and [Actions defined by Amazon WAF Regional](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awswafregional.html#awswafregional-actions-as-permissions).

To view examples of Amazon WAF Classic identity-based policies, see [Identity-based policy examples for Amazon WAF Classic](classic-security_iam_id-based-policy-examples.md).

## ACLs in Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-acls"></a>

**Supports ACLs:** No 

Access control lists (ACLs) control which principals (account members, users, or roles) have permissions to access a resource. ACLs are similar to resource-based policies, although they do not use the JSON policy document format.

## ABAC with Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-tags"></a>

**Supports ABAC (tags in policies):** Partial

Attribute-based access control (ABAC) is an authorization strategy that defines permissions based on attributes called tags. You can attach tags to IAM entities and Amazon resources, then design ABAC policies to allow operations when the principal's tag matches the tag on the resource.

To control access based on tags, you provide tag information in the [condition element](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_elements_condition.html) of a policy using the `aws:ResourceTag/{{key-name}}`, `aws:RequestTag/{{key-name}}`, or `aws:TagKeys` condition keys.

If a service supports all three condition keys for every resource type, then the value is **Yes** for the service. If a service supports all three condition keys for only some resource types, then the value is **Partial**.

For more information about ABAC, see [Define permissions with ABAC authorization](https://docs.amazonaws.cn/IAM/latest/UserGuide/introduction_attribute-based-access-control.html) in the *IAM User Guide*. To view a tutorial with steps for setting up ABAC, see [Use attribute-based access control (ABAC)](https://docs.amazonaws.cn/IAM/latest/UserGuide/tutorial_attribute-based-access-control.html) in the *IAM User Guide*.

## Using temporary credentials with Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-roles-tempcreds"></a>

**Supports temporary credentials:** Yes

Temporary credentials provide short-term access to Amazon resources and are automatically created when you use federation or switch roles. Amazon recommends that you dynamically generate temporary credentials instead of using long-term access keys. For more information, see [Temporary security credentials in IAM](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_credentials_temp.html) and [Amazon Web Services services that work with IAM](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_aws-services-that-work-with-iam.html) in the *IAM User Guide*.

## Forward access sessions for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-principal-permissions"></a>

**Supports forward access sessions (FAS):** Yes

 Forward access sessions (FAS) use the permissions of the principal calling an Amazon Web Services service, combined with the requesting Amazon Web Services service to make requests to downstream services. For policy details when making FAS requests, see [Forward access sessions](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_forward_access_sessions.html). 

## Service roles for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-roles-service"></a>

**Supports service roles:** Yes

 A service role is an [IAM role](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_roles.html) that a service assumes to perform actions on your behalf. An IAM administrator can create, modify, and delete a service role from within IAM. For more information, see [Create a role to delegate permissions to an Amazon Web Services service](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_roles_create_for-service.html) in the *IAM User Guide*. 

**Warning**  
Changing the permissions for a service role might break Amazon WAF Classic functionality. Edit service roles only when Amazon WAF Classic provides guidance to do so.

## Service-linked roles for Amazon WAF Classic
<a name="classic-security_iam_service-with-iam-roles-service-linked"></a>

**Supports service-linked roles:** Yes

 A service-linked role is a type of service role that is linked to an Amazon Web Services service. The service can assume the role to perform an action on your behalf. Service-linked roles appear in your Amazon Web Services account and are owned by the service. An IAM administrator can view, but not edit the permissions for service-linked roles. 

For details about creating or managing Amazon WAF Classic service-linked roles, see [Using service-linked roles for Amazon WAF Classic](classic-using-service-linked-roles.md).