Wireless-G Router WGR614v9 Reference Manual

4-8

Customizing Your Network Settings

v1.1, May 2008

Configuring 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. For more information about NAT, see

“How Your Computer

Accesses a Remote Computer through Your Router” on page 5-2

.

To change the NAT option:

1.

In the NAT Filtering area, select either the

Secured

or the

Open

radio button.

2.

Click

Apply

to save the new configuration.

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.

Wireless-G Router WGR614v9 Reference Manual

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•

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.

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.

Figure 4-4

Figure 4-5

Wireless-G Router WGR614v9 Reference Manual

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Customizing Your Network Settings

v1.1, May 2008

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

.

7.

Type the gateway IP address, which must be a router on the same LAN segment as the

Wireless-G Router.

8.

Type a number between 1 and 15 as the metric value.

This represents the number of routers between your network and the destination. Usually, a

setting of 2 or 3 works, but if this is a direct connection, set it to 1.

9.

Click

Apply

to have the static route entered into the table.

Wireless Repeating (Also Called WDS)

The Wireless-G Router can be used with a wireless access point (AP) to build large bridged

wireless networks. Wireless repeating is a type of Wireless Distribution System (WDS).

The following figure shows a wireless repeating scenario:

Warning:

If you use the wireless repeating function, your options for wireless security

are limited to None or WEP. For more information about wireless security, see

Chapter 2, “Safeguarding Your Network.”

Figure 4-6

Wireless Router (AP 1)

Internet

PCs

AP 2 is in Repeater mode.

This wireless computer is

associated with AP 2.

This wireless computer is

associated with AP 1.

Modem

is in Wireless Base Station mode.

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Customizing Your Network Settings

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In the scenario shown, the following conditions must be met for both APs:

•

Both APs must use the same SSID, wireless channel, and encryption mode (see information

about WEP in

“Configuring WEP Wireless Security” on page 2-7”

).

•

Both APs must be on the same LAN IP subnet. That is, all the AP LAN IP addresses are in the

same network.

•

All LAN devices (wired and wireless computers) must be configured to operate in the same

LAN network address range as the APs.

Wireless Repeating Function

You can view or change wireless repeater settings for the wireless router. From the main menu of

the browser interface, under Advanced, click

Wireless Repeating Function

to display the

Wireless Repeating Function screen.

The wireless router supports two modes of the wireless repeating function, and allows you to

control wireless client association:

•

Wireless Base Station mode

. The wireless router acts as the parent AP, bridging traffic to and

from the child repeater AP, as well as handling wireless and wired local computers. To

configure this mode, you must know the MAC addresses of the child repeater AP.

•

Wireless Repeater mode

. The wireless router sends all traffic from its local wireless or wired

computers to a remote AP. To configure this mode, you must know the MAC address of the

remote parent AP.

•

Disable Wireless Client Association

. Usually this check box is cleared so that the router is an

access point for wireless computers.

Figure 4-7

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If this check box is selected, the router communicates wirelessly only with other APs whose

MAC addresses are listed in this screen. The router still communicates with wire-connected

LAN devices.

Setting Up the Base Station

The wireless repeating function works only in hub and spoke mode. The units cannot be daisy

chained. You must know the wireless settings for both units. You must know the MAC address of

the remote unit. First, set up the base station, and then set up the repeater.

To set up the base station:

1.

Set up both units with exactly the same wireless settings (SSID, mode, channel, and security).

Note that the wireless security option must be set to

None

or

WEP

.

2.

From the main menu of the browser interface on the wireless router base unit, under

Advanced, click

Wireless Repeating Function

to display the Wireless Repeating Function

screen.

3.

Select the

Enable Wireless Repeating Function

check box and the

Wireless Base Station

radio button.

4.

Enter the MAC address for the repeater units.

5.

Click

Apply

to save your changes.

Figure 4-8