Set Up the L2TP VPN Tunnel on the ZyWALL/USG
In the ZyWALL/USG, go to Quick Setup > VPN Setup Wizard, use the VPN Settings for
L2TP VPN Settings wizard to create a L2TP VPN rule that can be used with the Android
mobile phone clients. Click Next.
Quick Setup > VPN Setup Wizard > Welcome
Then, configure the Rule Name and set My Address to be the wan1 interface which is
connected to the Internet. Type a secure Pre-Shared Key (8-32 characters).
Note: All network IP addresses and subnet masks are used as examples in this
article. Please replace them with your actual network IP addresses and subnet
masks. This example was tested using USG310 (Firmware Version: 4.25) and Android
(Version: 10.0.10240)