Modifies the internal access control policy of instances in a basic security group. The internal access control policy of instances in an advanced security group cannot be modified.
Operation description
Take note of the following items:
- When InnerAccessPolicy is set to Accept for a security group, the instances in the security group can communicate with each other. In this case, the Accept internal access control policy takes precedence over user-created security group rules to keep instances in the security group accessible to each other.
- When InnerAccessPolicy is set to Drop for a security group, the instances in the security group are isolated from each other. In this case, user-created security group rules take precedence over the Drop internal access control policy and can be used to allow access between the instances. For example, you can call the AuthorizeSecurityGroup operation to create an inbound security group rule that allows the instances in the security group to communicate with each other.
- You can call the DescribeSecurityGroupAttribute operation to query the internal access policy of a security group.
Debugging
Authorization information
The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:
- Operation: the value that you can use in the Action element to specify the operation on a resource.
- Access level: the access level of each operation. The levels are read, write, and list.
- Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level,
All Resourcesis used in the Resource type column of the operation.
- Condition Key: the condition key that is defined by the cloud service.
- Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
| Operation | Access level | Resource type | Condition key | Associated operation |
|---|---|---|---|---|
| ecs:ModifySecurityGroupPolicy | update | *SecurityGroup acs:ecs:{#regionId}:{#accountId}:securitygroup/{#securitygroupId} |
| none |
Request parameters
| Parameter | Type | Required | Description | Example |
|---|---|---|---|---|
| SecurityGroupId | string | Yes | The ID of the security group. | sg-bp67acfmxazb4ph**** |
| RegionId | string | Yes | The region ID of the security group. You can call the DescribeRegions operation to query the most recent region list. | cn-hangzhou |
| InnerAccessPolicy | string | Yes | The internal access policy of the security group. Valid values:
The value of this parameter is not case-sensitive. | Drop |
| ClientToken | string | No | The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence. | 123e4567-e89b-12d3-a456-426655440000 |
Response parameters
Examples
Sample success responses
JSONformat
{
"RequestId": "CEF72CEB-54B6-4AE8-B225-F876FF7BA984"
}Error codes
| HTTP status code | Error code | Error message | Description |
|---|---|---|---|
| 400 | MissingParamter.RegionId | The RegionId should not be null. | The RegionId parameter is required. |
| 400 | InvalidSecurityGroupId.Malformed | The SecurityGroupId is invalid. Only letters, numbers and underscores are supported. Maximum length is 100 characters. | The specified SecurityGroupId parameter is invalid. The value can be up to 100 characters in length and can contain only letters, digits, and underscores (_). |
| 400 | InvalidPolicy.Malformed | The Policy is invalid. Only 'Accept' and 'Drop' are supported. Ignore case. | - |
| 403 | InvalidOperation.ResourceManagedByCloudProduct | %s | You cannot modify security groups managed by cloud services. |
| 404 | InvalidSecurityGroupId.NotFound | The specified SecurityGroupId does not exist. | The specified security group does not exist in this account. Check whether the security group ID is correct. |
| 404 | InvalidParameter.InnerAccessPolicy | The InnerAccessPolicy attribute of enterprise level security group can't be modified. | - |
For a list of error codes, visit the Service error codes.
Change history
| Change time | Summary of changes | Operation |
|---|