User's Manual
93
February 2007
MP-202 Telephone Adapter
9. WAN Settings
9.4 WAN
L2TP
Layer 2 Tunneling Protocol (L2TP) is an extension to the PPP protocol, enabling your
gateway to create VPN connections. Derived from Microsoft's Point-to-Point Tunneling
Protocol (PPTP) and Cisco's Layer 2 Forwarding (L2F) technology, L2TP encapsulates
PPP frames into IP packets either at the remote user's PC or at an ISP that has an L2TP
Remote Access Concentrator (LAC). The LAC transmits the L2TP packets over the
network to the L2TP Network Server (LNS) at the corporate side.
With your gateway, L2TP is targeted at serving two purposes:
1.
Connecting the gateway to the Internet when it is used as a cable modem, or when
using an external cable modem. Such a connection is established using user name
and password authentication.
2.
Connecting the gateway to a remote network using a Virtual Private Network (VPN)
tunnel over the Internet. This enables secure transfer of data to another location over
the Internet, using private and public keys for encryption and digital certificates, and
user name and password for authentication.
9.4.1
Creating an L2TP IPSec VPN Connection with the Connection
Wizard
¾
To create a new L2TP IPSec VPN connection, take these steps:
1.
Click the link 'New Connection' in the screen 'Network Connections'; the screen
'Connection Wizard' opens.
2.
Select the radio button 'Connect to a Virtual Private Network over the Internet' and
click 'Next'; the screen 'Connect to a Virtual Private Network over the Internet' opens.