This is the next in a series of labs I designed and implemented while studying for the Fortinet NSE 4 7.2 exam.
Laptop: 192.168.16.2
Fortigate VPN interface: 192.168.16.1
Internal resource (Rasp Pi): 10.10.10.2
FortiClient settings. If you have an account with Fortinet you can download an unlicensed version of FortiClient for testing.