GreenSQL is an Open Source database firewall used to protect databases from SQL injection attacks. GreenSQL works as a proxy and has built in support for MySQL. The logic is based on evaluation of SQL commands using a risk scoring matrix as well as blocking known db administrative commands (DROP, CREATE, etc).

GreenSQL can be installed together with database server on the same computer or it can use a distinct server. By default GreenSQL listens on local port 127.0.0.1:3305 redirecting SQL requests to 127.0.0.1:3306 (default MySQL settings). This settings could be altered using GreenSQL Console.