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M2M Cellular Gateway
peer is configured to all packets are delivered via the L2TP tunnel, as shown in the
diagram by configuring the L2TP tunnel is the default gateway at L2TP client peer, the
Internet accessing packets will be also sent to the Security Gateway 1 in Network‐A and
be re‐transferred to the Internet. That means the Internet accessing of L2TP Client peer
is also controlled by the Security Gateway 1, the L2TP VPN server.
Scenario Description
L2TP Tunneling is a Client and Server based tunneling technology.
The L2TP Server must have a Static IP or a FQDN, and maintain a Client list (account /
password). The Client may be a mobile user or mobile site, and requesting the L2TP
tunnel connection with its account / password.
L2TP protocol is used for establishing a L2TP VPN tunnel.
The L2TP Client's "Default Gateway/Remote Subnet" setting determines how the
Internet traffic from L2TP client site is handled.
The L2TP over IPSec is usually used for BYOD devices to establish a secure VPN tunnel
between mobile employees and company office.
Parameter Setup Example
For Network‐B at Mobile Office
Following 3 tables list the parameter configuration for above example diagram of L2TP
VPN client in Network‐B.
Use default value for those parameters that are not mentioned in these tables.
Configuration Path
L2TP
Client/Server
Configuration Path
L2TP Client
Configuration Path
L2TP Client Name
Interface
L2TP over IPSec
Remote LNS IP/FQDN
Remote LNS Port
User Name
Password
Default Gateway/Remote Subnet
Authentication Protocol
MPPE Encryption
Service Port
Tunnel
Scenario Operation Procedure
In above diagram, Network‐A is in the headquarters, and the subnet of its Intranet is
Index skipping is used to reserve slots for new function insertion, when required.
[L2TP]‐[Configuration]
■ Enable
Client
[L2TP]‐[L2TP Client Configuration]
■ Enable
[L2TP]‐[
L2TP #1
WAN 1
■ Enable Preshare Key: 12345678
203.95.80.22
1701
User‐1
1234
Default Gateway
MS‐CHAP
■ Enable
Auto
■ Enable
Configuration for A L2TP Client]
221
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