Tenda V1200 User Manual page 46

Parameter
Enable Fullcone NAT
Dial on demand (with idle
timeout timer)
Enable Firewall
PPP IP extension
Use Static IPv4 Address
Use Static IPv6 Address
Enable IPv6 Unnumbered
Model
Launch Dhcp6c for Address
Assignment (IANA)
Launch Dhcp6c for Prefix
Delegation (IAPD)
Enable PPP Debug Mode
Bridge PPPoE Frames Between
WAN and Local Ports
Enable IGMP Multicast Proxy
Enable MLD Multicast Proxy
Step 7 Leave the configuration unchanged on Routing - Default Gateway page, and click Next.
Description
Data transmitted by a computer in LAN through the UDP port A will be
forwarded to the UDP port B in WAN. And data received by the UDP port B in
WAN will be forwarded to the UDP port A of the corresponding computer in
LAN.
When there is no data exchange within the specified time, the device
disconnects the connection between its WAN port and the ISP. Flow-based
charging users can select this option to save cost. Month-based charging users
do not need to select the option.
Check this option to enable the firewall of the modem router.
If this option is selected:
The NAT and firewall functions are disabled.

Only a computer in LAN can obtain the IP address which is the same as

that of the WAN port to access the internet. Other compurters cannot
obatin IP addresses to access the internet.
It is used to set up the IPv4 IP address assigned by the ISP after the PPPoE
dial-up succeeds. Do not set up it if you are not instructed by a professional.
It is used to set up the IP address assigned by the ISP after the PPPoE dial-up
succeeds. Do not set up it if you are not instructed by a professional.
It is used to enable the IPv6 unnumbered model. If your ISP is not required to
select it, keep the default.
If it is enabled, the device obtains the IPv6 WAN address using the stateful
DHCPv6 type.
If it is enabled, the device gets the IPv6 prefix form the DHCPv6 server, and
delivers it to its LAN ports.
If it is enabled, you can check the PPPoE dial-up information on the System
Log page. It is used to diagnose dial-up malfunctions.
If it is enabled, computers in LAN can share the WAN connection for internet
access, use multiple active PPPoE accounts to access the internet (if any).
If it is enabled, the modem router can forward the multicast data to the users
in LAN. If you requires multicast applications, such as VOD or AOD, you can
enable this option.
It is used to enable the MLD multicast proxy.
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