In this example, user sgreen is part of the Wizard_Users usergroup. Once the VPN tunnel is up, sgreen’s FortiClient Connect will be assigned an IP address in the range 192.168.1.[90-99]. If there are multiple devices sharing the VPN tunnel they will use that same range of IP addresses to share the tunnel.

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The original article/video can be found at FortiGate Cookbook – Using the FortiClient VPN to set up a VPN between a user and a private network