Draytek Vigor2912 Series User Manual page 288

Available settings are explained as follows:
Item
Dial-In Settings
Vigor2912 Series User's Guide
Description
Allowed Dial-In Type - Determine the dial-in connection
with different types.
PPTP - Allow the remote dial-in user to make a PPTP
VPN connection through the Internet. You should set
the User Name and Password of remote dial-in user
below.
IPsec Tunnel- Allow the remote dial-in user to trigger
an IPsec VPN connection through Internet.
L2TP with IPsec Policy - Allow the remote dial-in
user to make a L2TP VPN connection through the
Internet. You can select to use L2TP alone or with
IPsec. Select from below:
None - Do not apply the IPsec policy.
Accordingly, the VPN connection employed the
L2TP without IPsec policy can be viewed as one
pure L2TP connection.
Nice to Have - Apply the IPsec policy first, if it
is applicable during negotiation. Otherwise, the
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