NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual

5-6

Customizing Your Network Settings

v1.0, May 2009

From the main menu of the browser interface, under Advanced, select

Dynamic DNS

to display

the Dynamic DNS screen.

To configure Dynamic DNS:

1.

Register for an account with one of the Dynamic DNS service providers whose names appear

in the

Service Provider

list. For example, for DynDNS.org, select

www.dyndns.org

.

2.

Select the

Use a Dynamic DNS Service

check box.

3.

Select the name of your Dynamic DNS service provider.

4.

Type the host name (or domain name) that your Dynamic DNS service provider gave you.

5.

Type the user name for your Dynamic DNS account. This is the name that you use to log in to

your account, not your host name.

6.

Type the password (or key) for your Dynamic DNS account.

7.

If your Dynamic DNS provider allows the use of wildcards in resolving your URL, you can

select the

Use Wildcards

check box to activate this feature.

For example, the wildcard feature causes *.yourhost.dyndns.org to be aliased to the same IP

address as yourhost.dyndns.org.

8.

Click

Apply

to save your configuration.

Figure 5-2

NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual

Customizing Your Network Settings

5-7

v1.0, May 2009

Configuring the WAN Setup Options

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

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

WAN (Internet) port. From the main menu, under Advanced, click

WAN Setup

to view the WAN

Setup screen.

The WAN Setup fields are described in the following table:

Figure 5-3

Table 5-2.

WAN Setup Settings

Setting

Description

Disable SPI Firewall

The Stateful Packet Inspection (SPI) firewall protects your network and

computers against attacks and intrusions. A stateful packet firewall carefully

inspects incoming traffic packets, looking for known exploits such as

malformed, oversized, or out-of-sequence packets. The firewall should be

disabled only in special circumstances, such as when you are troubleshooting

application issues.

Default DMZ Server

This feature is sometimes helpful when you are using some online games and

videoconferencing. Be careful when using this feature because it makes the

firewall security less effective. See the following section,

Setting Up a Default

DMZ Server

.

Respond to Ping on Internet

WAN Port

If you want the wireless router to respond to a ping from the Internet, select

this check box. This should be used only as a diagnostic tool, since it allows

your wireless router to be discovered. Do not select this check box unless you

have a specific reason to do so.

NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual

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Customizing Your Network Settings

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Setting Up a 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.

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.

The WAN Setup screen lets you configure a default DMZ server.

To assign a computer or server to be a default DMZ server:

1.

In the last

Default DMZ Server

field, type the last digit of the IP address for that computer.

To remove the default DMZ server, enter 0 (zero).

2.

Select the

Default DMZ Server

check box, and click

Apply

.

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

“Changing

the MTU Size” on page 6-6

.

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.

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.

Table 5-2.

WAN Setup Settings

Setting

Description

NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual

Customizing Your Network Settings

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v1.0, May 2009

Configuring Static Routes

Static routes provide additional routing information to your router. Under usual circumstances, the

router has adequate routing information after it has been configured for Internet access, and you do

not need to configure additional static routes. You must configure static routes only for unusual

cases such as multiple routers or multiple IP subnets located on your network.

As an example of when a static route is needed, consider the following case:

•

Your primary Internet access is through a cable modem to an ISP.

•

You have an ISDN router on your home network for connecting to the company where you are

employed. This router’s address on your LAN is

1

92.168.1.100.

•

Your company’s network address is 134.177.0.0.

When you first configured your router, two implicit static routes were created. A default route was

created with your ISP as the gateway, and a second static route was created to your local network

for all 192.168.1.x addresses. With this configuration, if you attempt to access a device on the

134.177.0.0 network, your router forwards your request to the ISP. The ISP forwards your request

to the company where you are employed, and the request is likely to be denied by the company’s

firewall.

In this case you must define a static route, telling your router that 134.177.0.0 should be accessed

through the ISDN router at 192.168.1.100.

In this example:

•

The

Destination IP Address

and

IP Subnet Mask

fields specify that this static route applies

to all 134.177.x.x addresses.

•

The

Gateway IP Address

field specifies that all traffic for these addresses should be

forwarded to the ISDN router at 192.168.1.100.

•

A

Metric

value of 1 will work since the ISDN router is on the LAN.

•

Private

is selected only as a precautionary security measure in case RIP is activated.

NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual

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Customizing Your Network Settings

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Select

Static Routes

under Advanced in the main menu. The Static Routes screen displays.

To add or edit a static route:

1.

Click

Add

to expand the Static Routes screen.

2.

In the

Route Name

field, type a name for this static route. (This is for identification purposes

only.)

3.

Select the

Private

check box if you want to limit access to the LAN only. If Private is selected,

the static route is not reported in RIP.

4.

Select the

Active

check box to make this route effective.

5.

Type the IP address of the final destination.

6.

Type the IP subnet mask for this destination.

If the destination is a single host, type

255.255.255.255

.

Figure 5-4

Figure 5-5