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Web Application Firewall:DescribeDefenseRule

Last Updated:Mar 22, 2026

Retrieves the details of a specified protection rule.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

yundun-waf:DescribeDefenseRule

get

*All Resource

*

  • acs:ResourceGroupId
None

Request parameters

Parameter

Type

Required

Description

Example

InstanceId

string

Yes

The ID of the Web Application Firewall (WAF) instance.

Note

Call the DescribeInstance operation to query the ID of the WAF instance.

waf_cdnsdf3****

TemplateId

integer

No

The ID of the protection rule template.

Note

This parameter is required only when DefenseType is set to template.

10318

RuleId

integer

Yes

The ID of the protection rule.

20026192

DefenseType

string

No

The type of the protection rule. Valid values:

  • template (default): a protection rule template.

  • resource: a rule for a protected object.

  • global: a global rule.

Valid values:

  • template :

    template

  • resource :

    resource

template

RegionId

string

No

The region where the WAF instance resides. Valid values:

  • cn-hangzhou: the Chinese mainland.

  • ap-southeast-1: outside the Chinese mainland.

cn-hangzhou

ResourceManagerResourceGroupId

string

No

The ID of the Alibaba Cloud resource group.

rg-acfm***q

Resource

string

No

The protected object to which the protection rule applies.

Note

This parameter is required only when DefenseType is set to resource.

rencs***-waf

Response elements

Element

Type

Description

Example

object

The response parameters.

RequestId

string

The request ID.

D7861F61-5B61-46CE-A47C-6B19160D5EB0

Rule

object

The details of the protection rule.

Status

integer

The status of the protection rule. Valid values:

  • 0: disabled.

  • 1: enabled.

1

DefenseOrigin

string

The origin of the protection rule. This parameter indicates whether the rule was created by the user or by the system. Valid values:

  • custom: a custom rule.

  • system: a system-generated rule.

custom

Config

string

The configuration of the protection rule, returned as a JSON string. For more information, see the Protection rule parameters section in CreateDefenseRule.

{\"status\":1,\"policyId\":1012,\"action\":\"block\"}

RuleId

integer

The ID of the protection rule.

2732975

DefenseScene

string

The scenario to which the protection rule applies.

If the DefenseType parameter is set to template, the valid values are:

  • waf_group: basic protection with regular expression rules.

  • waf_base: web core protection.

  • waf_base_compliance: basic protection with protocol compliance rules.

  • waf_base_sema: basic protection with semantic analysis rules.

  • cc: HTTP flood protection.

  • antiscan_dirscan: directory traversal blocking in scan protection.

  • antiscan_highfreq: high-frequency scan blocking in scan protection.

  • antiscan_scantools: scanning tool blocking in scan protection.

  • ip_blacklist: an IP address blacklist.

  • custom_acl: a custom rule.

  • region_block: a location blacklist.

  • tamperproof: webpage tamper protection.

  • dlp: data leakage prevention.

  • custom_response_block: a custom response.

  • spike_throttle: peak traffic throttling.

If the DefenseType parameter is set to resource, the valid values are:

  • account_identifier: account identification.

  • custom_response: a custom response.

  • waf_codec: data decoding settings.

If the DefenseType parameter is set to global, the valid values are:

  • regular_custom: a custom regular expression.

  • address_book: an IP address book.

  • custom_response: a custom response.

waf_group

GmtModified

integer

The time when the protection rule was modified. This value is a UNIX timestamp. Unit: milliseconds.

1665196746000

RuleName

string

The name of the protection rule.

test1

TemplateId

integer

The ID of the protection rule template.

Note

This parameter is returned only if the DefenseType parameter is set to template.

9114

Resource

string

The protected object to which the protection rule applies.

Note

This parameter is returned only if the DefenseType parameter is set to resource.

rencs***-waf

DefenseType

string

The type of the protection rule. Valid values:

  • template (default): a protection rule template.

  • resource: a rule for a protected object.

  • global: a global rule.

template

Examples

Success response

JSON format

{
  "RequestId": "D7861F61-5B61-46CE-A47C-6B19160D5EB0",
  "Rule": {
    "Status": 1,
    "DefenseOrigin": "custom",
    "Config": "{\\\"status\\\":1,\\\"policyId\\\":1012,\\\"action\\\":\\\"block\\\"}",
    "RuleId": 2732975,
    "DefenseScene": "waf_group",
    "GmtModified": 1665196746000,
    "RuleName": "test1",
    "TemplateId": 9114,
    "Resource": "rencs***-waf",
    "DefenseType": "template"
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.