I am using AWS and I have just installed mysql in an EC2 environment with ubuntu 14, I have created my root user with which I can connect via SSH normally, but I have created another user with grant all privileges so that another person can upload changes to a BD and I tried to connect through a standard mode with the public dns of my EC2 but it rejects me. What am I doing wrong ?, I need to configure something? ... I have opened the respective port 3306 in my security group assigned to my EC2. I hope you can help me