All Products
Search
Document Center

Cloud Firewall:ModifyDnsFirewallPolicy

Last Updated:Jul 31, 2026

Modifies a DNS firewall rule.

Operation description

Modifies a DNS firewall access control policy to allow, deny, or monitor DNS firewall traffic.

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

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-cloudfirewall:ModifyDnsFirewallPolicy

update

*DnsFirewallPolicy

acs:yundun-cloudfirewall::{#accountId}:dnsfirewallpolicy/{#AclUuid}

None None

Request parameters

Parameter

Type

Required

Description

Example

SourceIp

string

No

The source IP address of the request.

192.0.XX.XX

Lang

string

No

The language of the request and response. Valid values:

  • zh: Chinese

  • en: English

zh

AclAction

string

No

The action that the access control policy performs on traffic in Cloud Firewall. Valid values:

  • accept: allows the traffic.

  • drop: deny the traffic.

  • log: monitors the traffic.

log

Description

string

No

The description of the access control policy.

test

Destination

string

No

The destination address in the access control policy.

  • If DestinationType is set to net, Destination is a destination CIDR block. Example: 1.2.3.4/24.

  • If DestinationType is set to group, Destination is the name of a destination address book. Example: db_group.

  • If DestinationType is set to domain, Destination is a destination domain name. Example: *.aliyuncs.com.

  • If DestinationType is set to location, Destination is a destination area. For more information about area positional encoding, see the following sections. Example: ["BJ11", "ZB"].

db_group

DestinationType

string

No

The type of the destination address in the access control policy.

Valid values:

  • net: destination CIDR block

  • group: destination address book

  • domain: destination domain name

net

Source

string

No

The source address in the access control policy. Valid values:

  • If SourceType is set to net, Source is a source CIDR block. Example: 10.2.21.**/24.

  • If SourceType is set to group, Source is the name of a source address book. Example: db_group.

192.0.21.**/24

AclUuid

string

Yes

The unique ID of the access control policy.

00281255-d220-4db1-8f4f-c4df22****

SourceType

string

No

The type of the source address in the access control policy. Valid values:

  • net: source CIDR block

  • group: source address book

net

Release

string

No

Specifies whether to enable the access control policy. The policy is enabled by default after it is created. Valid values:

  • true: enables the access control policy.

  • false: disables the access control policy.

true

Priority

string

No

The policy priority of the access control policy before the modification.

1

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

9C50C2A9-4BBB-5504-8ADA-C41A79****

Examples

Success response

JSON format

{
  "RequestId": "9C50C2A9-4BBB-5504-8ADA-C41A79****"
}

Error codes

HTTP status code

Error code

Error message

Description

400 ErrorParametersUid The aliUid parameter is invalid. The aliUid parameter is invalid.
400 ErrorDBSelect An error occurred while querying database. An error occurred while querying database.
400 ErrorAclNotExist The ACL does not exist. The ACL does not exist.
400 ErrorParameterIpVersion The IP version is invalid. The IP version is invalid.
400 ErrorParametersSource The source is invalid. The source is invalid.
400 ErrorParametersDestination The Destination parameter is invalid. The Destination parameter is invalid.
400 ErrorParametersAction The action is invalid. The action is invalid.
400 ErrorParametersNewOrder The newOrder is invalid. The newOrder is invalid.
400 ErrorParameters Parameters error. Parameter error.
400 ErrorAddressCountExceed The maximum number of addresses is exceeded. The maximum number of address is exceeded.
400 ErrorDBUpdate internal error: sql updat. An error occurred while updating the database.
400 ErrorDBInsert An error occurred while performing an insert operation in the database. An error occurred while performing an insert operation in the database.
400 ErrorRecordLog An error occurred while updating the operation log. An error occurred while updating the operation log.
400 ErrorMarshalJSON An error occurred while encoding JSON. An error occurred while encoding JSON.
400 ErrorAclRuleDuplicate acl rule duplicate. The same strategy exists.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.