By default MySQL does not allow remote connections. To change this you will need to modify the /etc/mysql/my.cnf file, change the bind-address line to reflect your droplet’s IP address:

bind-address        = your_database_IP

and then restart MySQL:

service mysql restart

what happen i faced this problem.

This is an old post, but since it was one of top Google searches I’m adding the solution that worked for me to fix the issue.

For anyone who has working SSH connection, like with Putty already, but still get connection errors after following this tutorial

These two things helped me fix:

Generate a private SSH key without passphrase
When using Puttygen, import your existing private key, then export it as OpenSSH. I previously used simply save private key and it didn’t work with Workbench (more info here https://www.digitalocean.com/community/questions/trying-to-connect-to-mysql-database-server-through-mysql-workbench-using-ssh)