NETGEAR genie Advanced Home
42
N300 Wireless ADSL2+ Modem Router DGN2200v3
WAN Setup
The WAN Setup screen lets you configure a DMZ (demilitarized zone) server, change the
Maximum Transmit Unit (MTU) size, and enable the modem router to respond to a ping on
the WAN (Internet) port.
To view or change the WAN settings:
Select Advanced > Setup > W
AN Setup
The following settings are available:
• Disable Port Scan and DoS Protection. DoS protection protects your LAN against
denial of service attacks such as Syn flood, Smurf
Attack, Ping of Death, Teardrop Attack,
UDP Flood, ARP Attack, Spoofing ICMP, Null Scan, and many others. This should be
disabled only in special circumstances.
• Default DMZ Server.
This feature is sometimes helpful when you are playing online
games or videoconferencing. Be careful when using this feature because it makes the
firewall security less effective. See the following section, Default DMZ Server, for more
details.
• Respond to Ping on Internet Port. If you want the modem router to respond to a ping
from the Internet, select this check box. Use this setting only as a diagnostic tool because
it allows your modem router to be discovered. Do not select this check box unless you
have a specific reason.
• MTU Size (in bytes).
The normal MTU (Maximum Transmit Unit) value for most Ethernet
networks is 1500 bytes, or 1492 bytes for PPPoE connections. For some ISPs, you might
need to reduce the MTU. This is rarely required. You should only change the setting in
this field if you are sure it is necessary for your ISP connection. See Change the MTU
Size on page 43.
• NA
T Filtering. Network Address Translation (NAT) determines how the modem router
processes inbound traffic. Secured NAT provides a secured firewall to protect the
computers on the LAN from attacks from the Internet, but might prevent some Internet
games, point-to-point applications, or multimedia applications from functioning. Open
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