This article describes how to setup split-tunnelling on L2TP/IPSEC VPN between FortiGate and Windows 10.
FortiOS does not support Split-tunneling unless we use FortiClient.
Some customers have mixed environments, and it is necessary to be able to utilize the OS native VPN client.
For versions 7.0.1 and above.
L2TP VPN over IPSEC is still used in many environments, some customers want to have split tunneling when L2TP VPN over IPSEC is configured.
If the traditional way is used, configured L2TP range can access only IP addresses from that range, because the Firewall does not provide additional routes.
Windows 10 output: