Chapter 1 What’s New for FortiOS 5.2.1 : Logging and Reporting
  
Logging and Reporting
New logging and reporting features include:
Traffic and UTM Logging Improvements
FortiGate Daily Security Report
GTP Logging Improvements
Flash-based Logging Disabled on Some Models
Accessing Policy-specific Logs from the Policy List
IPS Event Context Data in Log Messages
Sniffer Traffic Log
Selecting Sources for Reports
Threat Weight
Disk Usage Information in System Event Logs
Event Log Generated When a Crash Occurs
Displaying FortiFlow Names