ModifySecurityGroupPolicy -

Usage notes

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. 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 control policy of a security group.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter	Type	Required	Example	Description
Action	String	Yes	ModifySecurityGroupPolicy	The operation that you want to perform. Set the value to ModifySecurityGroupPolicy.
SecurityGroupId	String	Yes	sg-bp67acfmxazb4ph****	The ID of the security group.
RegionId	String	Yes	cn-hangzhou	The region ID of the security group. You can call the DescribeRegions operation to query the most recent region list.
InnerAccessPolicy	String	Yes	Drop	The internal access control policy of the security group. Valid values: Accept Drop Note The value of this parameter is case-insensitive.
ClientToken	String	No	123e4567-e89b-12d3-a456-426655440000	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.

Response parameters

Parameter	Type	Example	Description
RequestId	String	CEF72CEB-54B6-4AE8-B225-F876FF7BA984	The ID of the request.

Examples

Sample requests

https://ecs.aliyuncs.com/?Action=ModifySecurityGroupPolicy
&RegionId=cn-hangzhou
&SecurityGroupId=sg-bp67acfmxazb4ph****
&InnerAccessPolicy=Drop
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<ModifySecurityGroupPolicyResponse>
    <RequestId>CEF72CEB-54B6-4AE8-B225-F876FF7BA984</RequestId>
</ModifySecurityGroupPolicyResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "RequestId" : "CEF72CEB-54B6-4AE8-B225-F876FF7BA984"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidSecurityGroupId.Malformed	The SecurityGroupId is invalid. Only letters, numbers and underscores are supported. Maximum length is 100 characters.	Invalid SecurityGroupId value. The value can be up to 100 characters in length and can contain only letters, digits, and underscores (_).
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 is not found in this account. Check whether the security group ID is correct.

For a list of error codes, see Service error codes.