Draytek Vigor2920 Series User Manual page 218

Item
IPSec Security Method
GRE over IPSec
Settings
TCP/IP Network
Settings
Vigor2920 Series User's Guide
Description
first.
Subject Name First – The subject name (configured in
Certificate Management>>Local Certificate) will be
inspected first.
This group of fields is a must for IPSec Tunnels and L2TP
with IPSec Policy when you specify the remote node.
Medium- Authentication Header (AH) means data will be
authenticated, but not be encrypted. By default, this option is
active.
High- Encapsulating Security Payload (ESP) means payload
(data) will be encrypted and authenticated. You may select
encryption algorithm from Data Encryption Standard (DES),
Triple DES (3DES), and AES.
Enable IPSec Dial-Out function GRE over IPSec: Check
this box to verify data and transmit data in encryption with
GRE over IPSec packet after configuring IPSec Dial-Out
setting. Both ends must match for each other by setting same
virtual IP address for communication.
Logical Traffic: Such technique comes from RFC2890.
Define logical traffic for data transmission between both sides
of VPN tunnel by using the characteristic of GRE. Even hacker
can decipher IPSec encryption, he/she still cannot ask LAN
site to do data transmission with any information. Such
function can ensure the data transmitted on VPN tunnel is
really sent out from both sides. This is an optional function.
However, if one side wants to use it, the peer must enable it,
too.
My GRE IP: Type the virtual IP for router itself for verified
by peer.
Peer GRE IP: Type the virtual IP of peer host for verified by
router.
My WAN IP - This field is only applicable when you select
PPTP or L2TP with or without IPSec policy above. The default
value is 0.0.0.0, which means the Vigor router will get a PPP
IP address from the remote router during the IPCP negotiation
phase. If the PPP IP address is fixed by remote side, specify
the fixed IP address here. Do not change the default value if
you do not select PPTP or L2TP.
Remote Gateway IP - This field is only applicable when you
select PPTP or L2TP with or without IPSec policy above. The
default value is 0.0.0.0, which means the Vigor router will get
a remote Gateway PPP IP address from the remote router
during the IPCP negotiation phase. If the PPP IP address is
fixed by remote side, specify the fixed IP address here. Do not
change the default value if you do not select PPTP or L2TP.
Remote Network IP/ Remote Network Mask - Add a static
route to direct all traffic destined to this Remote Network IP
Address/Remote Network Mask through the VPN connection.
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