Enom

To enable the Enom Registrar integration in WHMCS, simply go to Configuration > Domain Registrars > Registrar Settings. Then choose Enom from the dropdown menu of available registrars and click Go to view the configurable options for it. You will then need to enter your username and password of your Enom account.

Note: Enom block all connections to your account from servers which aren't listed on their system. You therefore have to contact Enom and have your server IP added to the list of allowed IPs that can access your account before the communication will work. Failure to do this will result in an error such as "Invalid client IP: xxx.xx.xx.xxx "