Enable Remote MySQL Connections in cPanel
Please note that Top Speed shared customers are not permitted to use remote MySQL connections in order to ensure the security of the other customers on the same server. This guide is for Dedicated customers running Linux servers with cPanel.
Before using either of the following techniques, you will need to to open up port 3306 in your server’s firewall.
Enabling Remote MySQL in the WHM Interface
Log in to the server’s WHM interface and find the section in the left-side navigation bar labeled SQL Services. Click on the link marked Additional MySQL Access Hosts:

On the following page, enter one or more hosts or IP addresses in the text box (1) and click the Save button (2). If you wish to activate these settings on all user accounts see (3).
Now that the remote connection has been activated in the WHM each domain account that wants to use the remote connection will need to activate it in their own cPanel interface.
Enabling Remote MySQL in the Domain cPanel Interface
Using the X3 cPanel theme:
Log in to the domain’s cPanel interface and find the section on the main page labeled Databases.
In the Databases section find the link/button labeled Remote MySQL and click on it.

The following page will appear in your browser. Add a hostname or IP address that you want to grant remote MySQL access to (1) and then click the Save button (2).
If a host or IP address needs to be removed from this list you can click the red X next to the entry in the list.
Once you have made your changes/additions to the list you can return the main page of the cPanel interface, or log out if you have no other tasks to take care of.