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Security groups are not attached to an in-use network interface


A security group acts as a virtual firewall that controls the traffic to and from one or more resources. Delete unused security groups to prevent misuse.


  1. Log in to the AWS Management Console.
  2. Click Services.
  3. Click EC2.
  4. Click Security Groups.
  5. Click the Select All box.
  6. Choose Delete Security Groups from the Action dropdown.
  7. The resulting window provides details of your default security groups (undeletable), security groups that are in use (undeletable), and security groups that are not in use (deletable).
  8. To confirm deletion of security groups that are not in use, enter 'delete' in the box provided.
  9. Click delete.