ZyXEL Communications 200 Series - Manual (Page 437)

Chapter 26 L2TP VPN Example
ZyWALL USG 100/200 Series User’s Guide
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6 Click Properties.
Figure 347 Connect L2TP to ZyWALL
7 Click Security and select Advanced (custom settings) and click Settings.
Figure 348 Connect L2TP to ZyWALL: Security
8 Select Optional encryption allowed (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. Click Yes if a screen pops up.