Add an instance to a security group

You can add an instance to a security group through the console. Up to five security groups can be added to an instance.

  1. Log on to the ECS console.
  2. In the left-side navigation pane, click Instances.
  3. Select the region.
  4. Select the target instance by clicking the instance name or clicking its corresponding Manage button.
  5. Click Security Groups in the left-side navigation pane.
  6. Click Add Security Group and then select the required security group.
  7. Click OK.

After you add an instance to the security group, the rules apply to the instance automatically. 

Remove an instance from a security group

You can remove instances from security groups.

Note
  • An instance must be in at least two security groups for this action to be performed.
  • Do enough test before this operation to avoid any intranet communication error between instances.
  1. Log on to the ECS console.
  2. In the left-side navigation pane, click Instances.
  3. Select the target region.
  4. Select the target instance by click the instance name or clicking its corresponding Manage button.
  5. In the left-side navigation pane, click Security Groups. 
  6. Select the security group to remove from the instance and then click Remove.
  7. Click OK.

For use cases of security groups, see scenarios.