If your WHMCS installation runs behind proxy, you must pass the real ip to your backend (search for X-Real-IP or mod_remoteip).
Currently only IPv4 visitors are supported. IPv6 support follows.
The installation is fully automatic, when you open the "IPMI / KVM Proxy" page the first time, an installation dialog will be displayed.
If you have already a proxy installed, just click the "Deploy new proxy" button to install a new instance.