Our db is hosted on Amazon. Our web server can connect to the db. Connections to the db are not allowed outside of the web server.
Run ssh tunnel locally:
This creates a tunnel from my local machine to the web server:
ssh -N -L 3307:my-rds-db.us-east-1.rds.amazonaws.com:3306 ec2-my-web-server.compute-1.amazonaws.com