Netgear Centria Wndr4700 Wndr4720 Media Storage Router User Manual

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Within 2 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 front of 
the router blinks green. When the router es t
 ablishes a WPS connection, the LED is solid 
green, and the router WPS screen displays a confirmation message. 
4.  Repe
at 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. Go
  to the same Internet Setup screen that you can access from the 
dashboard on the Basic Home screen. See  Internet Setup on
  page 27.
•      W
ireless Setup. Go to the same Wireless Settings screen that you can access from the 
dashboard on the Basic Home screen. See  Basic Wireless Settings on
  page 33.
•      Guest Network . This sele
 ction 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  36.
•      W
AN Setup . Internet (WAN) setup. See  WAN Setup on p age 42 .
•      LAN Setup . Lo
 cal area network (LAN) setup. See  LAN Setup on page 45 .
•      QoS Setup. Qu
 ality of Service (QoS) setup. See  Quality of Service (QoS) Setup on 
page  48. 
						

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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. 
To view or change the WAN settings:
Select Advanc
 ed > Setup > WAN Setup
The following settings are available:
•     Disab
le 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. 
•      Defau
lt DMZ Server . This feature is sometimes hel pful 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.
•      Resp
ond to Ping on Internet Port . If you want the router to respond to a ping from the 
Internet, select this check box. Use this setti ng 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.
•      Disab
le IGMP Proxying . The IGPM Proxying feature lets a LAN computer receive the 
multicast traffic directed to it from the Internet. Selecting this check box prevents this from 
occurring.
•      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 change the setting in this 
field only if you are sure that it is necessary for your ISP connection. See  Change the 
MTU Size  on
  page 44.
•      NA
T Filtering . Network Address Translation (NAT) determines how the router processes 
inbound traffic. Secured NAT provides a secured firewall to protect the computers on the  
						

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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. 
•     Disable SIP ALG. The Session Initiation Protocol (SIP) Application Level Gateway (ALG) 
is enabled by default to optimize VoIP phone calls that use the SIP. The Disable SIP ALG 
check box allows you to disable the SIP ALG. Disabling the SIP ALG might be useful 
when running certain applications.
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 recognizes some of these applications and works 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.
The router usually detects and discards incoming traffic from the Internet that is not a 
response to local computers or a service that you set up in the Port Forwarding/Port 
Triggering screen. Instead of discarding this traffic, you can have the router forward the traffic 
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. 
						

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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 a device in the data path has a lower MTU 
setting than the other devices, the data packets are split or “fragmented” to accommodate the 
device with the smallest MTU. 
The best MTU setting for NETGEAR equipment is often just the default value. In some 
situations, changing the value fixes one problem but causes another. Leave the 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 does not open, or displays only part of a web page
-Yahoo email
-MSN portal
-America Online’s DSL service
•     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. For example, you might not be able to access certain 
websites, frames within websites, 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 3.  Common MTU sizes  
MTUApplication
1500The largest Ethernet packet size and the default value. This setting is typical for 
connections that do not use PPPoE or VPN, and is the default value for NETGEAR 
routers, adapters, and switches.
1492Used in PPPoE environments.
1472Maximum size to use for pinging. (Larger packets are fragmented.)
1468Used in some DHCP environments. 
						

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To change the MTU size:
1. Select Advanced > Setup > WAN Setup. 
2. In the MTU Size field, enter a value from 64 to 1500.
3. Click Apply to save the settings.
LAN Setup
The LAN Setup screen allows configuration of LAN IP services such as Dynamic Host 
Configuration Protocol (DHCP) and Routing Information Protocol (RIP).
The router is shipped preconfigured to use private IP addresses on the LAN side and to act 
as a DHCP server. The router’s default LAN IP configuration is:
•     LAN IP address. 192.168.1.1
•     Subnet mask. 255.255.255.0
These addresses are part of the designated private address range for use in private networks 
and are suitable for most applications. If your network requires a different IP addressing 
scheme, you can change these settings in the LAN Setup screen.
To change the LAN settings:
Note:  If you change the LAN IP address of the router, you are 
disconnected. To use the router menus, you must use a browser to 
connect to the new IP address and log in again.
1460Usable by AOL if you do not have large email attachments..
1436Used in PPTP environments or with VPN.
1400Maximum size for AOL DSL.
576Typical value to connect to dial-up ISPs.
Table 3.  Common MTU sizes  (Continued)
MTUApplication 
						

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1. 
Select  Advanced > Setup > LAN Setup to display the following screen:
2. Enter the settings that you want to customize. These settings are described in the following 
section,  LAN Setup Screen Settings .
3.  Click  Apply  to
  save your changes.
LAN Setup Screen Settings
LAN TCP/IP Setup
•     IP Address . The LAN IP address of the router.
•      IP Subnet Ma
 sk. The LAN subnet mask of the router. Combined with the IP address, the 
IP subnet mask allows a device to know which other addresses are local to it, and which 
addresses have to be reached through a gateway or router.
•      RIP Direction .
  Router Information Protocol (RIP) allows a router to exchange routing 
information with other routers. This setting  controls how the router sends and receives 
RIP packets. Both is the default setting. With the Both or Out Only setting, the router 
broadcasts its routing table periodically. With the Both or In Only setting, the router 
incorporates the RIP information that it receives.
•      RIP V
ersion . This setting controls the format and the broadcasting method of the RIP 
packets that the router sends. It recognizes  both formats when receiving. By default, the 
RIP function is disabled. 
RIP-1  is universally su
 pported. It is adequate for most networks, unless you have an 
unusual network setup. 
RIP-2  ca
rries more information. Both RIP-2B and RIP-2M send the routing data in RIP-2 
format. RIP-2B uses subnet broadcasting. RIP-2M uses multicasting. 
						

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Use Router as a DHCP Server 
Usually, this check box is selected so that the router functions as a Dynamic Host 
Configuration Protocol (DHCP) server. 
•     Starting IP Address. Specify the start of the range for the pool of IP addresses in the 
same subnet as the router.
•     Ending IP Address. Specify the end of the range for the pool of IP addresses in the 
same subnet as the router.
Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer receives 
the same IP address each time it accesses the router’s DHCP server. Assign reserved IP 
addresses to servers that require permanent IP settings. See 
Address Reservation on 
page 48.
Use the Router as a DHCP Server
By default, the router acts as a DHCP server. The router assigns IP, DNS server, and default 
gateway addresses to all computers connected to the LAN. The assigned default gateway 
address is the LAN address of the router. The router assigns IP addresses to the attached 
computers from a pool of addresses specified in this screen. Each pool address is tested 
before it is assigned to avoid duplicate addresses on the LAN. For most applications, the 
default DHCP and TCP/IP settings of the router are satisfactory. 
You can specify the pool of IP addresses that can be assigned by setting the starting IP 
address and ending IP address. These addresses should be part of the same IP address 
subnet as the router’s LAN IP address. Using the default addressing scheme, define a range 
between 192.168.1.2 and 192.168.1.254, although you might want to save part of the range 
for devices with fixed addresses.
The router delivers the following parameters to any LAN device that requests DHCP:
•     An IP address from the range that you have defined 
•     Subnet mask
•     Gateway IP address (the routers LAN IP address)
•     DNS server IP address (the routers LAN IP address)
To use another device on your network as the DHCP server, or to specify the network 
settings of all of your computers, clear the Use Router as DHCP Server check box and click 
Apply. Otherwise, leave this check box selected. If this service is not enabled and no other 
DHCP server is available on your network, set your computers’ IP addresses manually so 
that they can access the router. 
						

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Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer always 
receives the same IP address each time it ac
cesses the router’s DHCP server. Reserved IP 
addresses should be assigned to computers or se rvers that require permanent IP settings. 
To reserve an IP address: 
1. In the Add
 ress Reservation section of the screen, click the  Add button. 
2.  In
 the IP Address field, type the IP address to assign to the computer or server. (Choose an 
IP address from the router’s LAN subnet, such as 192.168.1.x.) 
3.  T
ype the MAC address of the computer or server.
Tip:  If the 
computer is already on your  network, you can copy its MAC 
address from the Attached Devices screen and paste it here.
4.  Click  Apply  to
  enter the reserved address into the table. 
The reserved address is not assigned until the next time the computer contacts the 
route
 r’s DHCP server. Reboot the computer, or access its IP configuration and force a 
DHCP release and renew.
To edit or delete a reserved address entry, select the radio button next to the reserved 
addre
 ss you want to edit or delete. Then click  Edit or Delete.
Quality of Service (QoS) Setup
QoS is an advanced feature that can be used to  prioritize some types of traffic ahead of 
others. The CENTRIA can provide QoS prioriti zation over the wireless link and on the 
Internet connection. 
To configure QoS: 
Select Advanc
 ed > Setup > QoS Setup to display the following screen:  
						

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Enable WMM QoS for Wireless
 Multimedia Applications
The CENTRIA supports Wi-Fi Multimedia Quality of  Service (WMM QoS) to prioritize wireless 
voice and video traffic over the wireless link.  WMM QoS provides prioritization of wireless 
data packets from different applications based on  four access categories: voice, video, best 
effort, and background. For an application to receive the benefits of WMM QoS, both it and 
the client running that application have to have WMM enabled. Legacy applications that do 
not support WMM and applications that do not require QoS, are assigned to the best effort 
category, which receives a lower priority than voice and video. 
WMM QoS is enabled by default. You can disable it in the QoS Setup screen by clearing the 
Ena
 ble WMM  check box and clicking  Apply.
Set Up QoS for Internet Access
You can give prioritized Internet access to the following types of traffic:
•     S
pecific applications
•     S
pecific online games
•     Individ
ual Ethernet LAN ports of the router
•     A spe
cific device by MAC address
To specify prioritization of traffic, create a policy for the type of traffic and add the policy to the 
QoS Policy t

able in the QoS Setup screen. For  convenience, the QoS Policy table lists many 
common applications and online games that can benefit from QoS handling.
QoS for Applications and Online Gaming
To create a QoS policy for applications and online games:
1.  I
n the QoS Setup screen, select the  Turn Internet Access QoS On check box.
2.  Click the Set
 up QoS Rule button to see the QoS Priority Rule list.  
						

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You can edit or delete a rule by selecting its radio button and clicking either the 
Edit or 
Delete  button. You can also delete all the rules by clicking the Delete All button.
3.  T
o add a priority rule, scroll down to the bottom of the QoS Setup screen and click  Add 
Priority Rule  to display the following screen:
4. In the QoS Policy for field, type the name of the application or game.
5.  In
 the Priority Category list, select either  Applications or Online Gaming . A list of 
applications or games displays.
6.  Y
ou can select an existing item from the list, or you can scroll and select  Add a New 
Application or Add a New Game,  as applicable. 
7.  If
 prompted, in the Connection Type list, select either  TCP, UDP,  or both ( TCP/UDP ). Specify 
the port number or range of port numbers that the application or game uses.
8.  From 
the Priority list, select the priority for Internet access for this traffic relative to other 
applications and traffic. The options are Low, Normal, High, and Highest.
9.  Click  Apply  
 to save this rule to the QoS Policy list and return to the QoS Setup screen.
QoS for a Router LAN Port
To create a QoS policy for a device connected to one of the router’s LAN ports:
1. Select  Advance
 d > Setup > QoS Setup  to display the QoS Setup screen. 
2.  Select the  T
 urn Internet Access QoS On  check box.
3.  Click the Setup QoS 
 Rule button.
4.  Click the Add Prio
 rity Rule button.
5.  From 
the Priority Category list, select  Ethernet LAN Port, as shown in the following figure:
6. From the LAN port list, select the LAN port.
7.  From 
the Priority list, select the priority for Internet access for this port’s traffic relative to 
other applications. The options are Low, Normal, High, and Highest.
8.  Click  Apply  
 to save this rule to the QoS Policy list and return to the QoS Setup screen.
9.  In
 the QoS Setup screen, click  Apply.