Chapter 8 L2TP VPN Example
ZyWALL USG 100/200 Series User’s Guide
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8 Click Security, select Advanced (custom settings) and click Settings.
Figure 164 Connect L2TP to ZyWALL: Security
9 Set Data encryption to 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 165 Connect ZyWALL L2TP: Security > Advanced
10 Click Yes. When you use L2TP VPN to connect to the ZyWALL, the ZyWALL
establishes an encrypted IPSec VPN tunnel first and then builds an L2TP tunnel
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