Type:
the type of the IPSec tunnel. Must be Transport Mode if the device
is set up as a client, and so does the gateway in this case.
Name
: a name of the tunnel used for identifying tunnels.
Server IP
: The IP address or URL of the L2TP server.
Preshared Key
: the secret key pre-set for the IPSec Tunnel and used by
both server and client.
Aggressive Mode
: the VPN tunnel will use Aggressive mode instead of
Main mode when enabled. Disabled by default.
IKE DH Group
: the Diffie-Hellman (DH) group used in the Internet Key
Exchange (IKEv2) protocol.
IKE Encryption:
defines the encryption algorithm used in the IKEv2
protocol.
IKE Hash:
defines the Hash function used in the IKEv2 protocol.
ESP Encryption:
defines the encryption algorithm used in the
Encapsulating Security Payload (ESP).
ESP Authentication:
defines the cryptography function used in the ESP
authentication.
Perfect Forward Secrecy:
option to enable the Perfect Forward Secrecy
(PFS) in the IPSec VPN. A PFS DH group will be needed if PFS is enabled.
In the L2TP VPN setup (server or client), choose the created IPSec tunnel for
the VPN in the IPSec option:
