WLAN VDSL Gateway User Manual
18
PPPoE service name can be blank unless your Internet Service Provider gives you a
value to enter.
Authentication method is default to Auto. It is recommended that you leave the
Authentication method in Auto, however, you may select PAP or CHAP if necessary.
The default value for MTU (Maximum Transmission Unit) is 1500 for PPPoA and 1492 for
PPPoE. Do not change these values unless your ISP asks you to.
Enable FullCone NAT, all requests from the same private IP address and port are
mapped to the same public source IP address and port. Someone on the Internet only
needs to know the mapping scheme in order to send packets to a device behind the ADSL
router.
The gateway can be configured to disconnect if there is no activity for a specific period of
time by selecting the Dial on demand check box and entering the Inactivity timeout. The
entered value must be between 1 minute and 4320 minutes.
The PPP IP Extension is a special feature deployed by some service providers. Unless
your service provider specifically requires this setup, do not select it. If you need to select
it, the PPP IP Extension supports the following conditions:
It allows only one computer on the LAN.
The public IP address assigned by the remote using the PPP/IPCP
protocol is actually not used on the WAN PPP interface. Instead, it is
forwarded to the computer’s LAN interface through DHCP. Only one
system on the LAN can be connected to the remote, since the DHCP
server within the ADSL gateway has only a single IP address to assign
to a LAN device.
NAPT and firewall are disabled when this option is selected.
The gateway becomes the default gateway and DNS server to the
computer through DHCP using the LAN interface IP address.
The gateway extends the IP subnet at the remote service provider to the
LAN computer. That is, the PC becomes a host belonging to the same
IP subnet.
The ADSL gateway bridges the IP packets between WAN and LAN ports,
unless the packet is addressed to the gateway’s LAN IP address.
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