As a registrar, you are able to maintain a list of IP addresses that are able to access our EPP. If you are looking to whitelist IP's for the Registry API, this won't help you, instead have a look here.
Log into the registrar console and locate the "access lists" section under the settings section.
On the page that opens your current list is displayed. You can add a single host or up to a /16 IP range to that list using the upper part.
Please note that changes take up to 10 minutes to propagate through the system.
