Chapter 8 L2TP VPN Example

inside it. The L2TP tunnel itself does not need encryption since it is inside the encrypted IPSec VPN tunnel.

Figure 165 Connect ZyWALL L2TP: Security > Advanced > Warning

11Click Networking. Set the Type of VPN to L2TP IPSec VPN and click IPSec Settings.

Figure 166 L2TP to ZyWALL Properties > Networking

12Select Use preshared key for authentication and enter the pre-shared key of the VPN gateway configuration that the ZyWALL is using for L2TP VPN (top-secret in this example). Click OK to close the IPSec Settings window and then click OK again to close the Properties window.

Figure 167 L2TP to ZyWALL Properties > Networking > IPSec Settings

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ZyWALL USG 300 User’s Guide