doc-exports/docs/vpc/umn/SecurityGroup_0017.html

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

Scenarios

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.

Adding an Instance to a Security Group

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

   The Virtual Private Cloud page is displayed.

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

   The security group list is displayed.

5. 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.

6. Click an instance type.

   The following operations use Servers as an example.

7. Click the Servers tab and click Add.

   The Add Server dialog box is displayed.

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

Removing an Instance from a 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 select the desired region and project.
3. Click in the upper left corner and choose Network > Virtual Private Cloud.

   The Virtual Private Cloud page is displayed.

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

   The security group list is displayed.

5. 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.

6. Click an instance type.

   The following operations use Servers as an example.

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

   A confirmation dialog box is displayed.

8. Confirm the information and click OK.

Follow-Up Operations

You can delete the security groups that you no longer need. Deleting a security group will also delete all security group rules in the security group. For details, see Deleting a Security Group.

Parent topic: Managing Instances Associated with a Security Group