Operation as the L2TP network server (LNS) for RAS clients
In order to configure the device as the L2TP network server (LNS) for authenticating RAS clients without configuring a RADIUS server in the device, you have two options:
Under Communication > Remote sites in the table L2TP endpoints, create an entry "DEFAULT".
The entry for the IP address is "0.0.0.0", because the IP address of the L2TP-LAC is unknown to the device.
Then, under Communication > Remote sites in the table L2TP list, configure a "DEFAULT" entry.
If the L2TP tunnel is to be connected permanently, set the short hold time to "9999".
Alternatively, you make a separate entry for the RAS client (e.g., "CLIENT") under Communication > Remote sites in the L2TP endpoints table.
You then configure a new entry for the client under Communication > Protocols in the PPP list.