In this video, you learn how to use Traffic Shaping on your Fortigate to limit the bandwidth for a specific IP address. When a particular IP address uses too many resources you can prevent that IP from consuming your bandwidth indiscriminately.
First, you will enable traffic shaping and create an address object to target a specific internal IP address. Then, you will create a shared shaper and a security policy that uses that specific IP address as the source address.
This recipe also explains how to configure traffic shaping to set a maximum bandwidth limit for uploads and/or downloads to 200 kb/s.
The recipe for this video is available here.