FortiGate comes with built-in Virtual Private Networking (VPN) of various types.
This article describes how to configure the VPN capabilities of the FortiGate and configure FortiClient for remote access VPNs.
For FortiOS version 6.2.3 and FortiClient version 6.2.6.
Below is a (living) list of resources available related to the native VPN capabilities in the FortiGate:
Video Library Resources: