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L2TP
The
Layer 2 Tunneling Protocol
(L2TP) is a Layer2 tunneling protocol for implementing virtual
private networks.
L2TP does not provide confidentiality or strong authentication by itself.
IPsec is often used to secure
L2TP packets by providing confidentiality, authentication and integrity. The combination of these two
protocols is generally known as L2TP/IPsec
.
In L2TP section, both pure L2TP and L2TP/IPSec are supported. Users can choose your preferable
option for your own needs.
Note:
4 sessions for Client and only one for Server respectively.
L2TP Server
In L2TP session, users can set the bassic parameters(authentication, encyption, peer address, etc)
for L2TP Server, and accounts in the page of VPN Account. They both constitutes the complete
L2TP Server settings.
L2TP:
Select
Enable
to activate L2TP Server.
Disable
to deactivate L2TP Server.
WAN Interface:
Select the exact WAN interface configured as source for the tunnel. Select different
interfaces, you will decide whether to use L2TP over IPSec or the pure L2TP.
L2TP over IPSec
, Select “Default or IPSec Tunnel” only when there is IPSec for L2TP rule in
place.
Pure L2TP
, Select Default (there is no IPSec for L2TP in place) or other interface to activate
the pure L2TP.
Auth. Type:
The authentication type, Pap or Chap, PaP, Chap. When using PAP, the password is
sent unencrypted, whilst CHAP encrypts the password
before sending, and also allows for
challenges at different periods to ensure that an intruder has
not replaced the client.
IP Addresses Assigned to Peer:
192.168.1.x: please input the IP assigned range from 1~ 254.
Tunnel Authentication:
Select whether to enable L2TP tunnel authentication. Enable it if needed
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and set the same in the client side.
Secret:
Enter the secretly pre-shared password for tunnel authentication.
Remote Host Name:
Enter the remote host name (of peer) featuring the destination of the L2TP
tunnel.
Local Host Name:
Enter the local host name featuring the source of the L2TP tunnel.
Exceptional Rule Group:
Select to grant or block access to a group of IPs to the L2TP server. See
Exceptional Rule Group
. If there is not any restriction, select none.
Click
Apply
to submit your L2TP Server basic settings.
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243
L2TP Client
L2TP client can help you dial-in the L2TP server to establish L2TP tunnel over Internet.
Name:
user-defined name for identification.
L2TP over IPSec:
If your L2TP server has used L2TP over IPSec feature, please enable this item.
under this circumstance, client and server communicate using L2TP over IPSec.
Enable
IPSec Tunnel:
Select the appropriate IPSec for L2TP rule configured for the L2TP Client.
Username:
Enter the username provided by your L2TP Server.
Password:
Enter the password provided by your L2TP Server.
Auth. Type:
Default is Pap or CHap if you want the router to determine the authentication type to
use, or else manually specify CHAP (Challenge Handshake Authentication Protocol) or PAP
(Password Authentication Protocol) if you know which type the server is using. When using PAP, the
password is sent unencrypted, whilst CHAP encrypts the password before sending, and also allows
for challenges at different periods to ensure that an intruder has not replaced the client.
L2TP Server Address:
Enter the IP address of the L2TP server.
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244
Connection Type
: Select Remote Access for single user, Select LAN to LAN for remote gateway.
Peer Network IP
: Please input the subnet IP for Server.
Peer Netmask
: Please input the Netmask for Server.
Tunnel Authentication:
Select whether to enable L2TP tunnel authentication, if the server side
enables this feature, please follow.
Secret:
Enter the set secret password in the server side.
Remote Host Name:
Enter the remote host name featuring the destination of the L2TP tunnel.
Local Host Name:
Enter the local host name featuring the source of the L2TP tunnel.
Click
Add
button to save your changes.
Disable
WAN Interface:
Select the exact WAN interface configured for the tunnel. Select Default to use the
now-working WAN interface for the tunnel. Under this circumstance, client and server communicate
through pure L2TP server.
Username:
Enter the username provided by your L2TP Server.
Password:
Enter the password provided by your L2TP Server.
Auth. Type:
Default is Pap or CHap if you want the router to determine the authentication type to
use, or else manually specify CHAP (Challenge Handshake Authentication Protocol) or PAP
(Password Authentication Protocol) if you know which type the server is using. When using PAP, the
password is sent unencrypted, whilst CHAP encrypts the password before sending, and also allows
for challenges at different periods to ensure that an intruder has not replaced the client.
L2TP Server Address:
Enter the IP address of the L2TP server.
Connection Type
: Select Remote Access for single user, Select LAN to LAN for remote gateway.
Peer Network IP
: Please input the subnet IP for Server.
Peer Netmask
: Please input the Netmask for server.
Tunnel Authentication:
Select whether to enable L2TP tunnel authentication, if the server side
enables this feature, please follow.
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245
Secret:
Enter the set secret password in the server side.
Remote Host Name:
Enter the remote host name featuring the destination of the L2TP tunnel.
Local Host Name:
Enter the local host name featuring the source of the L2TP tunnel.
Click
Add
button to save your changes.

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