Configuring A Pppoe Client - D-Link NetDefend DFL-210 User Manual

3.3.4. PPPoE
IP address information
PPPoE uses automatic IP address allocation which is similar to DHCP. When NetDefendOS
receives this IP address information from the ISP, it stores it in a network object and uses it as the IP
address of the interface.
User authentication
If user authentication is required by the ISP, the username and password can be setup in
NetDefendOS for automatic sending to the PPPoE server.
Dial-on-demand
If dial-on-demand is enabled, the PPPoE connection will only be up when there is traffic on the
PPPoE interface. It is possible to configure how the firewall should sense activity on the interface,
either on outgoing traffic, incoming traffic or both. Also configurable is the time to wait with no
activity before the tunnel is disconnected.
Unnumbered PPPoE
When NetDefendOS acts as a PPPoE client, support for unnumbered PPPoE is provided by default.
The additional option also exists to force unnumbered PPPoE to be used in PPPoE sessions.
Unnumbered PPPoE is typically used when ISPs want to allocate one or more preassigned IP
addresses to users. These IP addresses are then manually entered into client computers. The ISP
does not assign an IP address to the PPPoE client at the time it connects.
A further option with the unnumbered PPPoE feature in NetDefendOS is to allow the specification
of a single IP address which is used as the address of the PPPoE client interface. This address can
serve the following purposes:
• The IP address specified will be sent to the PPPoE server as the "preferred IP". If unnumbered
PPPoE is not forced, the server may choose to not accept the preferred IP and instead assign
another IP address to the PPPoE client.
When the option to force unnumbered PPPoE is selected, the client (that is to say NetDefendOS)
will not accept assignment of another IP address by the server.
• The IP address specified, or possibly the address assigned by the PPPoE server when
unnumbered PPPoE is not forced, will serve as the IP address of the PPPoE client interface. This
will be used as the local IP address for traffic leaving the interface when the traffic is originated
or NATed by the NetDefend Firewall.
Example 3.12. Configuring a PPPoE client
This example shows how to configure a PPPoE client on the wan interface with traffic routed over PPPoE.
CLI
gw-world:/> add Interface PPPoETunnel PPPoEClient
Web Interface
1. Go to Interfaces > PPPoE > Add > PPPoE Tunnel
EthernetInterface=wan Network=all-nets
Username=exampleuser Password=examplepw
96
Chapter 3. Fundamentals