TP-Link TD-W8968 User Manual page 28

Enable NAT: This technology translates the IP addresses of a local area network to a

different IP address for the Internet. If this modem router is hosting your network's
connection to the Internet, please select the check box. If another router exists in your
network, you don't need to select the option.
Enable Fullcone NAT:

Enable Firewall:

firewall, or else without a firewall.
Enable IGMP Multicast:

Group Management Protocol) packets to be forwarded to the LAN. IGMP is used to
manage multicasting on TCP/IP networks. Most users will not need to enable this. Some
ISPs use IGMP to perform remote configuration for client devices, such as the router. If you
are unsure, check with your ISP.

Note:
If you select the Enable NAT
page. We will describe the detailed configuration in
6. Select a preferred
7. Configure the DNS Server Addresses on the screen as follows.
It is a type of NAT. If not enabled, the default NAT will act.
A SPI firewall enhances network's security. Select the option to use a
This is disabled by default. This setting will not allow IGMP (Internet
checkbox, the
WAN interface as the system default gateway and click Next.
NAT menu will be added to the web management
4.4.6 NAT.
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TD-W8968 User Guide