ZyXEL Communications ZyWALL USG 300 User Manual page 209

Name the IP security policy L2TP to ZyWALL, and click Next.
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Figure 199 IP Security Policy: Name
Clear the Activate the default response rule check box and click Next.
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Figure 200 IP Security Policy: Request for Secure Communication
ZyWALL USG 300 User's Guide
Chapter 8 L2TP VPN Example
209