Chapter 4 Create Secure Connections Across the Internet
ZyWALL USG 20-2000 User’s Guide
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7 Enter the domain name or WAN IP address configured as the My Address in the VPN gateway
configuration that the ZyWALL is using for L2TP VPN (172.16.1.2 in this example).
8 Click Finish.
9 The Connect L2TP to ZyWALL screen appears. Click Properties > Security.
10 Click Security, select Advanced (custom settings) and click Settings.
11 Select Optional encryption (connect even if no encryption) and the Allow these protocols
radio button. Select Unencrypted password (PAP) and clear all of the other check boxes. Click
OK.