i have lost the keypair of my ec2 instance. I created an image from the previous instance and launched a new instance. But now I wish to block access to the previous instance without stopping it. I tried deleting the keypair from the list of keypairs in aws management console on a different instance, but this does not stop a user who has the key file from accessing it.
Is there some way to block access to the instance... prefereably from the management console ?