Here is a small tutorial if you want to grant remote access to a DB on your server.
First login trough SSH on your server and get access to you mysql
$mysqladmin -u XXX password XXX
Note: that db_user and db_passwd are your database username and database password
GRANT ALL PRIVILEGES ON db_base.* TO db_user @’%’ IDENTIFIED BY ‘db_passwd’;
You can also grant accesss to a specific IP adress
GRANT ALL PRIVILEGES ON failserv_example.* TO failserver@’XX.XX.XX.XX’ IDENTIFIED BY ‘db_passwd’;
(where X is your own remote IP)
After that to activate your setting type
FLUSH PRIVILEGES;
And exit your mysql
$mysql>quit
HAVE FUN!

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After getting into the mysql prompt to allow remote machines to access the mysql only from a particular IP you can execute
GRANT ALL PRIVILEGES ON yourdatabase.* TO db_user @’192.168.1.35’ IDENTIFIED BY ‘db_passwod’;
Where 192.168.1.35 is the remote host IP, you can use the hostname instead of IP but it is better to use IP due to overhead of DNS lookup if using hostnames.