Glassfish v3 and JDBC realm

Surfing the web I was not able to find a clear tutorial on configuring a JDBC realm in Glassfish. Here I publish a short how-to with some screenshot of web administration console.

First of all connect to the console and go to Security / Realms and create a new one. Set name and class as in figure:

And below you have to set the properties according to your database configuration. In fact here you have to tell Glassfish where login information are. According to the database configuration in my precedent post: