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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 166 Connect ZyWALL L2TP: Security > Advanced > Warning
11 Click Networking. Set the Type of VPN to L2TP IPSec VPN and click IPSec
Settings.
Figure 167 L2TP to ZyWALL Properties > Networking
12 Select 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 168 L2TP to ZyWALL Properties > Networking > IPSec Settings
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ZyWALL USG 300 User's Guide
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Troubleshooting
