Follow the steps below to setup the L2TP VPN option on your iOS device for VPN connection to a ZyWALL (ZLD) series firewall.
- On your iOS device click on the "Settings" button.
- In the Settings menu select General → VPN.
- Click on the "Add VPN Connection…" option to insert the L2TP rule.
- Enter the information based on what you've configured on the ZyWALL L2TP VPN.
- Once the L2TP setup is saved you will be able to connect the tunnel.