Whitelisting an IP for MySQL in CPanel
I guess this allows an IP to connect through your web host´s firewall.
In CPanel go to
Update Billing Info >
Update Now >
Customer Preferences >
MySQL Whitelisted IPs
Enter the IP
Done 
I guess this allows an IP to connect through your web host´s firewall.
In CPanel go to
Update Billing Info >
Update Now >
Customer Preferences >
MySQL Whitelisted IPs
Enter the IP
Done