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Set Up the L2TP VPN Tunnel on the iOS Device
To configure L2TP VPN in an iOS 8.4 device, go to Menu > Settings > VPN > Add
VPN Configuration and configure as follows.
Description is for you to identify the VPN configuration.
Set Server to the ZyWALL/USG's WAN IP address (172.124.163.150 in this example).
Enter Account and Password which the same as Allowed User created in
ZyWALL/USG (L2TP_Remote_Users/zyx168 in this example).
Set Secret to the Pre-Shared Key of the IPSec VPN gateway the ZyWALL/USG uses
for L2TP VPN over IPSec (zyx12345 in this example).
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