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Chapter 4: Configuration
107
Configuring the L2TP VPN in the Office
Item
Function
Description
1
Connection Name
VPN_L2TP
Given name of L2TP connection
Dial out
Check Dial out
2
Server IP Address (or
Hostname)
69.121.1.33
An Dialed server IP
Username
username
3
Password
123456
A given username & password
4
Auth.Type
Chap(Auto)
Keep as default value in most of the cases.
5
Idle Timeout
0
The connection will be disconnected when
there Is no traffic in a predefined period of time.
Idle time 0 means the connection is always on.
IPSec
Enable for enhancing your L2TP VPN security.
Authentication
MD5
Encryption
3DES
Perfect
Forward
Secrecy
None
6
Pre-shared Key
12345678
Both sites should use the same value.
1
4
3
2
5
6
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Chapter 4: Configuration
108
Example: Configuring your Router to Dial-in to the Server
Currently, Microsoft Windows operation system does not support L2TP incoming service.
Additional software may be required to set up your L2TP incoming service.
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Chapter 4: Configuration
109
Example: Configuring LAN-to-LAN L2TP VPN Connection
The branch office establishes a L2TP VPN tunnel with head office to connect two private networks over
the Internet. The routers are installed in the head office and branch office accordingly.
Both office LAN networks
MUST in different subnet
with LAN to LAN
application.
Functions of
Pre-shared Key, VPN Connection Type and
Security Algorithm MUST BE
identically set up on both sides.
Attention
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Chapter 4: Configuration
110
Configuring L2TP VPN in the Head Office
The IP address 192.168.1.200 will be assigned to the router located in the branch office. Please make
sure this IP is not used in the head office LAN.
Item
Function
Description
1
Connection Name
HeadOffice
Given a name of L2TP connection
Dial in
Check Dial in
2
Private
IP
Address
Assigned to Dialing
User
192.168.1.200
IP address assigned to branch office network
Peer Network IP
192.168.0.0
Branch office network
3
Netmask
255.255.255.0
Username
username
4
Password
123456
Input username & password to authenticate branch
office network
5
Auth.Type
Chap(Auto)
Keep as default value in most of the cases.
6
Idle Timeout
0
The connection will be disconnected when there Is no
traffic in a predefined period of time.
Idle time 0 means
the connection is always on.
IPSec
Enable for enhancing your L2TP VPN security.
Authentication
MD5
Encryption
3DES
Perfect
Forward
Secrecy
None
7
Pre-shared Key
12345678
Both sites should use the same value.
1
4
3
2
5
6
7
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Chapter 4: Configuration
111
Configuring L2TP VPN in the Branch Office
The IP address 69.1.121.30 is the
Public IP
address of the router located in head office. If you
registered the DDNS (please refer to the
DDNS
section of this manual), you can also use the domain
name instead of the IP address to reach the router.
Item
Function
Description
1
Connection Name
BranchOffice
Given a name of L2TP connection
Dial out
Check Dial out
2
Server
IP
Address
(or
Hostname)
69.121.1.33
IP address of the head office router (in WAN side)
Peer Network IP
192.168.1.0
3
Netmask
255.255.255.0
Head office network
Username
username
4
Password
123456
Input username & password to authenticate
branch office network
5
Auth.Type
Chap(Auto)
Keep as default value in most of the cases.
6
Idle Timeout
0
The connection will be disconnected when there
Is no traffic in a predefined period of time.
Idle
time 0 means the connection is always on.
IPSec
Enable for enhancing your L2TP VPN security.
Authentication
MD5
Encryption
3DES
Perfect Forward Secrecy
None
7
Pre-shared Key
12345678
Both sites should use the same value.
1
4
3
2
5
6
7
19216811.live