Digi TX40 User Manual page 601

Virtual Private Networks (VPN)
(config)> add vpn l2tp lns lns_server
(config vpn l2tp lns lns_server)>
LACs are enabled by default. To disable:
(config vpn l2tp lns lns_server)> enable false
(config vpn l2tp lns lns_server)>
b. Set the IP address of the L2TP access concentrator that this server will allow connections
from:
(config vpn l2tp lns lns_server)> lac IP_address
(config vpn l2tp lns lns_server)>
This can also be:
n
n
c. Set the IP address of the L2TP virtual network interface:
(config vpn l2tp lns lns_server)> local_address IP_address
(config vpn l2tp lns lns_server)>
d. Set the IP address to assign to the remote peer:
(config vpn l2tp lns lns_server)> remote_address IP_address
(config vpn l2tp lns lns_server)>
e. (Optional) Set the authentication method:
(config vpn l2tp lns lns_server)> auth method
(config)>
where method is one of the following:
n
n
n
n
n
If auto, chap, pap or mschapv2 is selected, enter the Username and Password required
to authenticate:
(config vpn l2tp lns lns_server)> username username
(config vpn l2tp lns lns_server)> password password
(config vpn l2tp lns lns_server)>
The default is none.
TX40 User Guide
A range of IP addresses, using the format x.x.x.x-y.y.y.y, for example 192.168.188.1-
192.168.188.254.
The keyword any, which means that the server will accept connections from any IP
address.
none: No authentication is required.
auto: The device will attempt to connect using CHAP first, and then PAP.
chap: Uses the Challenge Handshake Authentication Profile (CHAP) to authenticate.
pap: Uses the Password Authentication Profile (PAP) to authenticate.
mschapv2: Uses the Microsoft version of the Challenge Handshake Authentication
Profile (CHAP) to authenticate.
L2TP
601