D-Link DSL-4730B User Manual page 24

If you select the PPP over Ethernet (PPPoE) or PPP over ATM (PPPoA) as
the connection protocol, the following page appears.

PPP Username: The correct user name that your ISP provides to you.

PPP Password: The correct password that your ISP provides to you.

Authentication Method: The value can be AUTO, PAP, CHAP, or
MSCHAP. Usually, you can select AUTO.

Dial on demand (with idle timeout timer): If this function is enabled,
you need to enter the idle timeout time. Within the preset minutes, if the
router does not detect the flow of the user continuously, the router
automatically stops the PPPoE connection. Once it detects the flow (like
access to a webpage), the router restarts the PPPoE dialup.
If this function is disabled, the router performs PPPoE dial-up all the
time. The PPPoE connnection does not stop, unless the router is
powered off and DSLAM or uplink equipment is abnormal.

MTU Size: Maximum Transmission Unit. Sometimes, you must modify
this function to access network successfully.

PPP IP extension: If this function is enabled, the WAN IP address
obtained by the router through built-in dial-up can be directly assigned to
the PC being attached to the router (at this time, the router connects to
only one PC). From the aspect of the PC user, the PC dials up to obtain
an IP addres. But actually, the dial-up is done by the router. If this
function is disabled, the router itself obtains the WAN IP address.

Use Static IP Address: If this function is disabled, the router obtains an
IP address assigned by an uplink equipment such as BAS, through
PPPoE dial-up.
If this function is enabled, the router uses this IP address as the WAN IP
address.

Enable NAT: Select it to enable the NAT functions of the router. If you do
not want to enable NAT and wish the router user to access the Internet
normally, you must add a route on the uplink equipment. Otherwise, the
access to the Internet fails. Normally, NAT should be enabled.

Enable Firewall: Enable or disable IP filtering.

Enable IGMP Multicast: IGMP proxy. For example, if you wish that the
PPPoE mode supports IPTV, enable this function.
DSL-2730B User Manual
21