Mysql with non local access

I would log in with phpMyAdmin as root, with no password (or via Terminal over SSH as root using your admin password) and create yourself a new MySQL Super-User with password protection. Then disable phpMyAdmin's "log in as root" and "allow log-ins without a password" settings.

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Check out the linked article on setting up phpMyAdmin. Refer to the "Using Set-up script" section (You will need to create the pma user in advance, and need to import the "create-tables.sql" from the "examples" folder on the NAS, if you want to use phpMyAdmin as your general administration interface.

IP-OF-YOUR-NAS:7082/doc/html/setup.html#setup_script

In step 7 Change the following command:

chmod o-rw config.inc.php          # remove world read and write permissions

to read:

chmod o-w config.inc.php          # remove world read and write permissions

or phpMyAdmin won't be able to read it's own config file.

The add-on (phpMyAdmin) installs to "/data/apps/phpmyadminr6" and the working folder you'll need for the instructions in the guide is "/data/apps/phpmyadminr6/web".