I've installed DNS Manager for WHMCS and able to successfully connect to my cPanel DNSONLY cluster, but cannot successfully connect with my powerdns master.
I have granted the WHMCS IP privileges in mysql on the powerdns master, I can see the WHMCS machine attempt to connect on port 3306 to the master, but I am not able to use the test connection feature with success. My powerdns master is in use with SolusVM, so I know it functions properly, at least for SolusVM, but I am not finding anything in the docs or searching this forum on what my issue could be.