L2TP/IPSec
Since L2TP itself does not provide any encryption or confidentiality, IPSec
encryption can be used to secure the data packet that passes within the
tunnel, which is call L2TP/IPSec.
To set up L2TP/IPSec VPN, an IPSec tunnel needs to be created for L2TP VPN,
either a server or client. Go to Advanced Networking -> IPSec and select
IPSec Gateway (for L2TP Server) or IPSec Client (for L2TP Client) in one of the
IPSec tunnels.
For gateway settings:
Mode:
the working modes of the IPSec Tunnel, must be Gateway when
used with a L2TP server.
Type:
the type of the IPSec tunnel - Tunnel Mode or Transport Mode. If
a L2TP/IPSec client is Linux based device, Transport Mode should be
used.
Name
: a name of the tunnel used for identifying tunnels.
Preshared Key
: the secret key pre-set for the IPSec Tunnel and used by
both gateway and client.
