Chapter 10 Install and System Administration for FortiOS 5.0 : Using the web-based manager : Entering text strings
  
Entering text strings
The configuration of a FortiGate unit is stored in the FortiOS configuration database. To change the configuration, you can use the web‑based manager or CLI to add, delete, or change configuration settings. These changes are stored in the database as you make them.
Individual settings in the configuration database can be text strings, numeric values, selections from a list of allowed options, or on/off (enable/disable) settings.