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Anti-DDoS:DescribeDDosEventMax

Last Updated:Jul 13, 2026

Queries the peak attack throughput of volumetric attacks (bps), connection flood attacks (cps), and web resource exhaustion attacks (qps).

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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-ddoscoo:DescribeDDosEventMax

get

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

StartTime

integer

Yes

The start of the time range to query. This value is a UNIX timestamp. Unit: seconds.

1598889600

EndTime

integer

Yes

The end of the time range to query. This value is a UNIX timestamp. Unit: seconds.

1604073600

Ip

string

No

When you call this operation, you must include common parameters of Alibaba Cloud APIs in addition to the request parameters described in this topic. For more information about common parameters, see Common parameters.

For the request format, see the request examples in the Examples section of this topic.

Response elements

Element

Type

Description

Example

object

Qps

integer

The peak attack throughput of web resource exhaustion attacks. Unit: qps.

26314

RequestId

string

The request ID.

5AE2FC86-C840-41AE-9F1A-3A2747C7C1DF

Cps

integer

The peak attack throughput of connection flood attacks. Unit: cps.

1302

Mbps

integer

The peak attack throughput of volumetric traffic attacks. Unit: Mbps.

6809

Examples

Success response

JSON format

{
  "Qps": 26314,
  "RequestId": "5AE2FC86-C840-41AE-9F1A-3A2747C7C1DF",
  "Cps": 1302,
  "Mbps": 6809
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.