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N600 Wireless Dual Band Router WNDR3400v2

WPS Wizard

The WPS Wizard helps you add a WPS-capable client device (a wireless device or computer)

to your network. On the client device you need to either press its WPS button or locate its

WPS PIN.

To use the WPS Wizard:

1.

Select

Advanced > WPS Wizard

.

2.

Click

Next

. The following screen lets you select the method for adding the WPS client (a

wireless device or computer).

You can use either the push button or PIN method.

3.

Select either

Push Button

or

PIN Number

.

•

To use the push button method, either click the

WPS

button on this screen, or press

the

WPS

button located on the top of the router. Within two minutes, go to the

wireless client and press its

WPS

button to join the network without entering a

password.

•

To use the PIN method, select the

PIN Number

radio button, enter the client security

PIN, and click

Next

.

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N600 Wireless Dual Band Router WNDR3400v2

Within two minutes, go to the client device and use its WPS software to join the

network without entering a password.

The router attempts to add the WPS-capable device. The WPS LED

on the top of

the router blinks green. When the router establishes a WPS connection, the LED is solid

green, and the router WPS screen displays a confirmation message.

4.

Repeat Step 2 and Step 3 to add another WPS client to your network.

Setup Menu

Select

Advanced > Setup

to display the Setup menu. The following selections are available:

•

Internet Setup

. This is a shortcut to the same Internet Setup screen that you can access

from the dashboard on the Basic Home screen. See

Internet Setup

on page

23.

•

Wireless Setup

. This is a shortcut to the same Wireless Setup screen that you can

access from the dashboard on the Basic Home screen. See

Basic Wireless Settings

on

page

27.

•

Guest Network

. This is a shortcut to the same Guest Network screen that you can

access from the dashboard on the Basic Home screen. See

Guest Networks

on page

31.

•

WAN Setup

. Internet (WAN) setup. See

WAN Setup

on page

38.

•

LAN Setup

. Local area network (LAN) setup. See

LAN Setup

on page

41.

•

QoS Setup

. Quality of Service (QoS) setup. See

Quality of Service (QoS) Setup

on

page

44.

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N600 Wireless Dual Band Router WNDR3400v2

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 sometimes 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 Internet 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 Proxying

. 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

39.

•

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.

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Default DMZ Server

The default DMZ server feature is helpful when you are using some online games and

videoconferencing applications that are incompatible with Network Address Translation

(NAT). The router is programmed to recognize some of these applications and to work

correctly with them, but there are other applications that might not function well. In some

cases, one local computer can run the application correctly if that computer’s IP address is

entered as the default DMZ server.

WARNING!

DMZ servers pose a security risk. A computer designated as the

default DMZ server loses much of the protection of the firewall

and is exposed to exploits from the Internet. If compromised, the

DMZ server computer can be used to attack other computers on

your network.

Incoming traffic from the Internet is usually discarded by the router unless the traffic is a

response to one of your local computers or a service that you have configured in the Port

Forwarding/Port Triggering screen. Instead of discarding this traffic, you can have it

forwarded to one computer on your network. This computer is called the default DMZ server.



To set up a default DMZ server:

1.

On the WAN Setup screen, select the

Default DMZ Server

check box.

2.

Type the IP address.

3.

Click

Apply

.

Change the MTU Size

The Maximum Transmission Unit (MTU) is the largest data packet a network device

transmits. When one network device communicates across the Internet with another, the data

packets travel through many devices along the way. If any device in the data path has a lower

MTU setting than the other devices, the data packets have to be split or “fragmented” to

accommodate the device with the smallest MTU.

The best MTU setting for NETGEAR equipment is often just the default value, and changing

the value might fix one problem but cause another. Leave MTU unchanged unless one of

these situations occurs:

•

You have problems connecting to your ISP or other Internet service, and the technical

support of either the ISP or NETGEAR recommends changing the MTU setting. These

web-based applications might require an MTU change:

-

A secure website that will not open, or displays only part of a web page

-

Yahoo email

-

MSN portal

-

America Online’s DSL service

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•

You use VPN and have severe performance problems.

•

You used a program to optimize MTU for performance reasons, and now you have

connectivity or performance problems.

Note:

An incorrect MTU setting can cause Internet communication

problems such as the inability to access certain web sites, frames

within web sites, secure login pages, or FTP or POP servers.

If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are

willing to experiment, you can gradually reduce the MTU from the maximum value of 1500

until the problem goes away. The following table describes common MTU sizes and

applications.

Table 2.

Common MTU sizes

MTU

Application

1500

The largest Ethernet packet size and the default value. This is the typical setting for

non-PPPoE, non-VPN connections, and is the default value for NETGEAR routers,

adapters, and switches.

1492

Used in PPPoE environments.

1472

Maximum size to use for pinging. (Larger packets are fragmented.)

1468

Used in some DHCP environments.

1460

Usable by AOL if you do not have large email attachments, for example.

1436

Used in PPTP environments or with VPN.

1400

Maximum size for AOL DSL.

576

Typical value to connect to dial-up ISPs.



To change the MTU size:

1.

Select

Advanced > Setup > WAN Setup

.

2.

In the MTU Size field, enter a new size between 64 and 1500.

3.

Click

Apply

to save the settings.