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It's been quite long time since I heard about greenSQL for the 1st time . greenSQL is basically a firewall that works for MySql. If you do need to know more about it , you can read one of great article written by lirva32 from echo (http://ezine.echo.or.id/ezine20/e20_0x0d.txt)Well , make sure you read THIS before you decide to deploy it! :)