Migrating Oracle to MySQL: MySql Workbench Not Available
You can use ssh to securely forward the MySQL port remotely. For example, if you execute:

ssh -L 3307:localhost:3306 &lt;ssh-user&gt;@&lt;remote-server&gt;


You will be able to connect to the local port 3307 as if MySQL was running there. All connection information will be tunneled though ssh, so it will be sent securely. That way you can connect using Workbench using localhost:3307

I cannot say if Workbench would be the best tool for the migration, though. Here you have some pointers and tools: http://database-scalability.blogspot.com.es/2014/04/porting-from-oracle-to-mysql.html