I've added my server address to the Authorized IP Addresses section on my WP install. In testing, I'm no longer authorized to initiate commands from WHMCS. The ip address ends in 252, but I receive an error message that the request is coming from 225. I can't find anywhere that the site shows this IP and I feel like those numbers are too similar to be anything other than a typo.
WHMCS and the Multisite install run on the same server on the same hosting account so I can't think of any reason why this won't work except that maybe I have a setting wrong somewhere? Maybe in WHMCS?