PFS (Perfect Forward Secrecy) = Group DH 5.

NAT-TRAVERSAL = NAT-T if availiable (default).

Cryptographic methode = Secure (default).

groupe password = 'ipsec psk' = yourpsk (<= Here put the PSK).

groupe name = 'ipsec group id' = 0 (<= Here you need to put 0).

Select VPNC for the type of the VPN connexion.

open your connection manager and add a new VPN connection.

Install network-manager-vpnc-gnome or network-manager-vpnc-kde or network-manager-vpnc depending on your desktop (use yum, apt or whatever packet manager of your distrib or build it from source)

Thanks to Dusan Mijatovic for it previous post on this page. It can be use where Forticlient Linux is not usable (it do not have IPSEC tab to configure a mobile IPSEC access)

So, following this if you are under Linux make it easy to connect the standard IPSEC mobile VPN the Fortigate wizard create. It works with the following parameters if on the Fortigate, the VPN was created using the wizard (and no particular tuning had been done) Reading this topic, I was able to connect to the 'standard Fortigate IKEv1 IPSEC VPN for Mobile client'.

Fortinet vpn client 6.4 download