4.6
VPN L2TP
Layer 2 Tunneling Protocol (L2TP) is an extension to the PPP protocol, en-
abling your GlobeSurfer 3G to create VPN connections. Derived from Mi-
crosoft’s Point-to-Point Tunneling Protocol (PPTP) and Cisco’s Layer 2 For-
warding (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 concentra-
tor (LAC). The LAC transmits the L2TP packets over the network to the L2TP
network server (LNS).
4.6.1
Creating an L2TP Connection
To create a L2TP client connection, perform the following steps:
1. Click
Network Connections
on the sidebar – the
Network Connections
screen
will appear (see figure
4.88
).
Figure 4.88: Network Connections
2. Click the
New connection
link to list the connection alternatives.
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