Draytek Vigor2830 Series User Manual page 261

Click each index to edit one remote user profile. Each Dial-In Type requires you to fill the
different corresponding fields on the right. If the fields gray out, it means you may leave it
untouched. The following explanation will guide you to fill all the necessary fields.
Available settings are explained as follows:
Item
User account and
Authentication
Allowed Dial-In Type
Description
Enable this account - Check the box to enable this function.
Idle Timeout- If the dial-in user is idle over the limitation of
the timer, the router will drop this connection. By default, the
Idle Timeout is set to 300 seconds.
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 make 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 dial-in VPN
connection becomes one pure L2TP connection.

Must -Specify the IPSec policy to be definitely applied
on the L2TP connection.
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Vigor2830 Series User's Guide