TP-Link Archer D5 User Manual page 35

Archer D5 AC1200 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide
Click Advance, advanced selections for WAN Service Setup can be shown.
 MTU (bytes):. The default MTU (Maximum Transmission Unit) value is 1500 Bytes. Do not
change the default value unless required by your ISP.
 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.
 Enable Fullcone NAT: It is a type of NAT, if not enabled, the default NAT will act.
 Enable SPI Firewall: The SPI firewall enhances network's security. Select the option to use a
firewall, or else without a firewall.
 Enable IGMP Proxy: IGMP (Internet Group Management Protocol) is used to manage
multicasting on TCP/IP networks. Some ISPs use IGMP to perform remote configuration for
client devices, such as the modem router. It is enabled by default.
Figure 4-6
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