User manual

PPP IP Extension
The PPP IP Extension is a special feature deployed by some service providers.
Unless your service provider specially requires this setup, do not select it.
The PPP IP Extension supports the following conditions:
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Allows only one PC on the LAN
The public IP address assigned by the remote side using the PPP/IPCP
protocol is actually not used on the WAN PPP interface. Instead, it is
forwarded to the PC’s LAN interface through DHCP. Only one PC on the LAN
can be connected to the remote, since the DHCP server within the ADSL
router has a single IP address to assign to a LAN device.
NAPT and firewall are disabled when this option is selected.
The ADSL router becomes the default gateway and DNS server to the PC
through DHCP using the LAN interface IP address.
The ADSL router extends the IP subnet at the remote service provider to the
LAN PC. That is, the PC becomes a host belonging to the same IP subnet.
The ADSL router bridges the IP packets between WAN and LAN ports, unless
the packet is addressed to the router’s LAN IP address.
Enable NAT checkbox: If the LAN is configured with a private IP address, the
user should select this checkbox. The NAT submenu on the left side main panel
will be displayed after reboot. The user can then configure NAT-related features
after the system comes up. If a private IP address is not used on the LAN side,
this checkbox should be de-selected to free up system resources for better
performance. When the system comes back after reboot, the NAT submenu will
not be displayed on the left main panel.
Enable Firewall checkbox: If the firewall checkbox is selected, the Security
submenu on the left side main panel will be displayed after system reboot. The
user can then configure firewall features after the system comes up. If firewall is
not used, this checkbox should be de-selected to free up system resources for
better performance. When system comes back after reboot, the Security
submenu will not be displayed on the left main panel.
Use Static IP Address
Unless your service provider specially requires this setup, do not select it.
If selected, enter your static IP address.
Enable PPP Debug Mode
Enable the PPPoE debug mode. The system will put more PPP connection
information in System Log. But this is for debug, please don't enable in normal
usage.
2. Click Next to display the screen on the following page.
Enable IGMP Multicast checkbox: Tick the checkbox to enable IGMP multicast
(proxy). IGMP (Internet Group Membership Protocol) is a protocol used by IP
hosts to report their multicast group memberships to any immediately
neighboring multicast routers.
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