:original_name: ddm_06_0035.html

.. _ddm_06_0035:

Configuring Access Control
==========================

Scenarios
---------

DDM supports load balancing by default, but some regions may not support. If an application accesses DDM using a private IP address, there are no traffic restrictions. To control access, you need to configure access control for your DDM instance. The security group is still valid for access requests directly sent to DDM nodes.

Procedure
---------

.. important::

   After a read-only group is created, the entry for configuring access control will be moved to the operation column of the group.

#. On the DDM console, choose **Instances** in the navigation pane. In the instance list, locate the DDM instance that you want to scale out, and click its name. On the displayed **Basic Information** page, enable **Access Control** in the **Network Information** area.
#. Click **Configure**. In the **Configure Access Control** dialog box, specify **Access Policy**, enter the required IP addresses, and click **OK**.

   .. note::

      If read/write splitting is enabled, access control only takes effect for groups.