D-Link DFL-1600 User Manual page 261

22.2. PPTP/ L2TP
2. IPsec Tunnel
Next step is to configure the IPsec tunnel.
Interfaces IPsec Tunnels
General
Enter the following:
Name: L2TPIPsecTunnel
Local Network: IP of the interface to connect from.
Remote Network: 10.0.0.1 (As this is where the L2TP/IPsec server is
located)
Remote Endpoint: (None)
Encapsulation Mode: Transport
Algorithms
IKE Algorithms: Medium
IPsec Algorithms: Medium
Authentication
Pre-Shared Key: Select the pre-shared key created earlier, L2TPKey in
this case.
Routing
Automatic Routing
The IPsec tunnel needs to be configured to notdynamically add routes to
the remote network when the tunnel is established. This is done under the
Routing tab. Dynamically add route to the remote network when a
tunnel is established: Disable
Then click OK
Add
D-Link Firewalls User's Guide
IPsec Tunnel:
241