Chapter 6 Deploying Wireless Networks for FortiOS 5.0 : Introduction to wireless networking : Security : Monitoring for rogue APs : Wireless Intrusion Detection (WIDS)
  
Wireless Intrusion Detection (WIDS)
You can create a WIDS profile to enable several types of intrusion detection:
Unauthorized Device Detection
Rogue/Interfering AP Detection
Ad-hoc Network Detection and Containment
Wireless Bridge Detection
Misconfigured AP Detection
Weak WEP Detection
Multi Tenancy Protection
MAC OUI Checking