Adding an Instance to or Removing an Instance from a Security Group

When you create an instance, the system automatically adds the instance to a security group for protection.

• If one security group cannot meet your requirements, you can add an instance to multiple security groups.
• An instance must be added to at least one security group. If you want to change the security group for an instance, you can add the instance to a new security group and then remove the instance from the original security group.

You can add servers, supplementary network interfaces, and extended network interfaces to a security group by referring to the following operations:

• Adding an Instance to a Security Group
• Removing an Instance from a Security Group

1. Log in to the management console.
2. Click in the upper left corner and choose Network > Virtual Private Cloud.

   The Virtual Private Cloud page is displayed.

3. In the navigation pane on the left, choose Access Control > Security Groups.

   The security group list is displayed.

4. In the security group list, locate the row that contains the security group and click Manage Instances in the Operation column.

   The Associated Instances tab is displayed.

5. Click the required instance type tab.

   The following operations use Servers as an example.

6. Click the Servers tab and click Add.

   The Add Server dialog box is displayed.

7. In the server list, select one or more servers and click OK to add them to the current security group.

An instance must be added to at least one security group. If you want to remove an instance from a security group, the instance must be associated with at least two security groups now.

1. Log in to the management console.
2. Click in the upper left corner and choose Network > Virtual Private Cloud.

   The Virtual Private Cloud page is displayed.

3. In the navigation pane on the left, choose Access Control > Security Groups.

   The security group list is displayed.

4. In the security group list, locate the row that contains the security group and click Manage Instances in the Operation column.

   The Associated Instances tab is displayed.

5. Click the required instance type tab.

   The following operations use Servers as an example.

6. Click the Servers tab, select one or more servers, and click Remove in the upper left corner above the server list.

   A confirmation dialog box is displayed.

7. Confirm the information and click OK.