Chapter 15 Unified Threat Management for FortiOS 5.0 : Data leak prevention : Preconfigured sensors
  
Preconfigured sensors
A number of preconfigured sensors are provided with your FortiGate unit. These can be edited or added to more closely match your needs.
Some of the preconfigured sensors with filters ready to go are:
Credit-Card - This sensor logs the traffic, both files and messages, that contain credit card numbers in the formates used by American Express, MasterCard and Visa.
Large-File - This sensor logs the traffic consisting of files larger than 5120 kB or approximately 5 MB.
SSN-Sensor - This sensor logs the traffic, both files and messages, that contain Social Security Numbers with the exception of those that are WebEx invitation emails.
 
These rules affect only unencrypted traffic types. If you are using a FortiGate unit that can decrypt and examine encrypted traffic, you can enable those traffic types in these rules to extend their functionality if required.
 
Before using the rules, examine them closely to ensure you understand how they will affect the traffic on your network.