The secret code as a "Set IPSec pre-shared key" (You can see the secret code on the image below). And disable "L2TP secret". Save settings by pushing a "Menu" button (Hardware button on your device) and click on "Save" Your VPN settings is now ready.

EdgeRouter - L2TP IPsec VPN Server – Ubiquiti Networks set vpn l2tp remote-access authentication local-users username password set vpn l2tp remote-access client-ip-pool start 192.168.100.240 set vpn l2tp remote-access client-ip-pool stop 192.168.100.249 set vpn l2tp remote-access dns-servers server-1

set vpn l2tp remote-access dns-servers server-2
Mobile VPN with L2TP - WatchGuard Mobile Virtual Private Networking (Mobile VPN) with L2TP (Layer 2 Tunneling Protocol) creates a secure connection between a remote computer and the network resources behind the Firebox. By default, Mobile VPN with L2TP uses IPSec to provide strong encryption and authentication.

Here is the instruction how to connect to your SoftEther VPN Server by using L2TP/IPsec VPN Client which is built-in on Windows XP, 7, 8, RT, Server 2003, 2008 and 2012. On this instruction, we use Windows 7 screens. Windows XP and Windows 8 are similar, however there are …

L2TP/IPsec Manual Setup Instructions for VyprVPN on Android 2.X Devices Bold items are things you will tap or type Open the 'Settings' application and tap 'Wireless and Network'.

Unblock VPN - How to set up L2TP on Android

RUT950 L2TP over IPsec (Windows 10) - Wiki Knowledge Base Mar 16, 2020 L2TP VPN on Mikrotik, Android and Windows | Murray's Blog