ISP Account L2TP/IPsec with pre-shared key/certificate

PeterUK

So I only just worked out how to setup a client VPN PPTP to with this:

https://freevpn724.com/

on the ZyWALL but doing a L2TP for here:

https://freevpn4you.net/l2tp-ipsec.php

needs a Pre-shared key.

So could the drop down Protocol list:

L2TP/IPsec with pre-shared

L2TP/IPsec with certificate

in ISP Account

Thanks