Add an instance to a security group

You can add an instance to a security group using the console. One ECS instance can be added to up to five security groups.

  1. Log on to the ECS console.
  2. Click Instances in the left-side navigation pane.
  3. Select a region.
  4. Select an instance. Click the instance name or corresponding Manage button.
  5. Click Security Groups in the left-side navigation pane.
  6. Click Add Security Group. In the displayed dialog box, select the appropriate 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. Click Instances in the left-side navigation pane.
  3. Select a region.
  4. Select an instance. Click the instance name or corresponding Manage button.
  5. Click Security Groups in the left-side navigation pane. You can view the security group list that this instance belongs to. 
  6. Select the security group to remove from and click Remove.
  7. Click OK.

For use cases of security groups, see scenarios.