Netgear WNR3500L [35/114] Wan setup

Genie Advanced Home

N300 Wireless Gigabit Router WNR3500Lv2

WAN Setup

The WAN Setup screen lets you configure a DMZ (demilitarized zone) server, change the

Maximum Transmit Unit (MTU) size, and enable the router to respond to a ping on the WAN

(Internet) port. Select Advanced > Setup > WAN Setup to view the following screen:

• 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 some

times helpful when you are playing online

games and/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 I

nternet Port. If you want the router to respond to a ping from the

Internet, select this check box. Use this only as a diagnostic tool because it allows your

router to be discovered. Do not select this check box unless you have a specific reason.

• Disable

IGMP Prox

ying. IGMP proxying allows a computer on the local area network

(LAN) to receive the multicast traffic it is interested in from the Internet. You can select

this check box to disable the feature if you do not need it.

• 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, and should not be done unless you are

sure it is necessary for your ISP connection. See Change the MTU Size on page 36.

•

NAT Filtering. Network

Address Translation (NAT) determines how the 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 NAT

provides a much less secured firewall, but allows almost all Internet applications to

function.