ZyXEL Communications 200 Series - Manual (Page 423)

Chapter 26 L2TP VPN Example
ZyWALL USG 100/200 Series User’s Guide
423
Figure 312 Connect L2TP to ZyWALL: Security
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.
Figure 313 Connect ZyWALL L2TP: Security > Advanced
12 Click IPSec Settings.