[support] Sorry, 10.0.11.38 has been banned.

For my website when using Firefox or Chrome you get the following message: *Sorry, 10.0.11.38 has been banned.* For Internet Explorer you *403 forbidden* error.

Note: 10.0.11.38 is the internal IP of the load balancer which has the dhttp://mapsindeed.com/omains certificate and associated public IP address. I went to admin/user/rules and noticed that this ip of 10.0.11.38 has been listed as a host to deny access so I deleted this rule and the drupal website displays again. We did not enter this ip as a rule originally so I suspect that drupal somehow decided to add this ip as a denied host.

How would I prevent this from happening again?

John