Draytek Vigor2110 Series User Manual page 177

Allowed Dial-In Type
PPTP
IPSec Tunnel
L2TP
Specify Remote VPN
Gateway
reused to avoid the computation complexity in phase 2. The
default value is inactive this function.
Local ID -In Aggressive mode, Local ID is on behalf of the IP
address while identity authenticating with remote VPN server.
The length of the ID is limited to 47 characters.
Determine the dial-in connection with different types.
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.
Allow the remote dial-in user to trigger an IPSec VPN
connection through Internet.
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 dial-in VPN connection
becomes one pure L2TP connection.
Must - Specify the IPSec policy to be definitely applied on the
L2TP connection.
You can specify the IP address of the remote dial-in user or
peer ID (should be the same with the ID setting in dial-in
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Vigor2110 Series User's Guide