Chapter 4 Create Secure Connections Across the Internet
ZyWALL USG 20-2000 User’s Guide
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4 If a warning screen about data encryption not occurring if PAP or CHAP is negotiated, 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 inside it. The L2TP tunnel itself does not need
encryption since it is inside the encrypted IPSec VPN tunnel.
Connect Using L2TP VPN
1 In the Network and Sharing Center screen, click Connect to a network, select the L2TP VPN
connection and click Connect to display a login screen. Enter the user name and password of your
ZyWALL user account and click Connect.
2 A window appears while the user name and password are verified. The Connect to a network
screen shows Connected after the L2TP over IPSec VPN tunnel is built.
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