Fortinet FortiGate 1U Quick Start Manual page 124

Creating an application
control sensor to monitor
traffic
Go to Security Profiles > Application
Control > Application Sensors. Select
the plus icon in the upper right corner of
the window to create a new sensor list for
monitoring application traffic.
Select Create New to add a new application
filter. Leave all Filter Options selected.
Ensure that you set the Action to Monitor.
At this stage in the process, you are
monitoring the traffic to locate any problems
that may be occurring, rather than blocking
applications.
104 The FortiGate Cookbook 5.0.