Billion BiPAC 7700N User Manual page 53

and port. Furthermore, any external host can send a packet to the internal host, by sending a packet
to the mapped external address.
Note: In PPPoE connection, NAT is enabled by default, you can determine whether to enable
Fullcone NAT. And while you disabled Fullcone NAT and only use NAT, the default NAT type is Port
Restricted cone NAT. Of Port-Restricted cone NAT, the restriction includes port numbers. Specifically,
an external host can send a packet, with source IP address X and source port P, to the internal host
only if the internal host had previously sent a packet to IP address X and port P
Dial on demand: enable or disable, if you want to Dial on demand, enable this function.
Inactivity timeout: available when you enable Dial on demand function. Enter the Inactivity
timeout interval.
PPP IP extension: After enabling it, it allows only one computer on the LAN side to browse the
internet. The public IP address assigned by the remote, will be applied to the host through DHCP
(DHCP server on CPE can only assign one IP address). And, NAT and Firewall feature will be
disabled when this option is selected.
Use Static IPv4 Address: enable to use the static IPv4 address, else to get an IPv4 address
automatically.
IPv4 Address: available when enabled to use IPv4 address, and please enter the Static IPv4
address if you enable Static IP Address.
Enable PPPoE Debug mode: check whether to enable this function, it is used to debug PPPoE link,
and the debug message will be seen in System log.
Enable KeepAlive: If enabled， CPE will send PPPoE Echo message to the server periodically.
KeepAlive Time: available when you enabled KeepAlive above, then enter the time cycle for CPE to
send PPPoE Echo message to the server periodically (0-30 min).
Max Fail: enter the max fail times. It is a number used to determine when PPPoE disconnects. For
example, suppose the number is 3, then if the router fails to receive any echo reply from the server
for 3 times, PPPoE disconnects automatically.
Bridge PPPoE Frame between WAN and Local Ports: check whether to enable this function. It
allows PC in LAN to set up its own PPP link, or the PC will access internet via the PPP link in WAN
port.
Enable IGMP Multicast Proxy: check whether to enable this function. IGMP (Internet Group
Management Protocol) Proxy intercept the IGMP request from Clients and forward it to the router
after some dealings.
Click Next to go on to the Default Gateway setting.
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