Cisco RV-120W Router Manual PDF (Setup & Configuration Guide)

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Configuring the Wireless Network

A Note About Wireless Security

Cisco RV120W Administration Guide

Wireless Security Tips

Since you cannot physically prevent someone from connecting to your wireless

network, you need to take some additional steps to keep your network secure:

•

Change the default wireless network name or SSID

Wireless devices have a default wireless network name or Service Set

Identifier (SSID) set by the factory. This is the name of your wireless

network, and can be up to 32 characters in length.

You should change the wireless network name to something unique to

distinguish your wireless network from other wireless networks that may

exist around you, but do not use personal information (such as your Social

Security number) because this information may be available for anyone to

see when browsing for wireless networks.

•

Change the default password

For wireless products such as access points, routers, and gateways, you

will be asked for a password when you want to change their settings. These

devices have a default password set by the factory. The default password

is often admin. Hackers know these defaults and may try to use them to

access your wireless device and change your network settings. To thwart

any unauthorized changes, customize the device’s password so it will be

hard to guess.

•

Enable MAC address filtering

Cisco routers and gateways give you the ability to enable Media Access

Control (MAC) address filtering. The MAC address is a unique series of

numbers and letters assigned to every networking device. With MAC

address filtering enabled, wireless network access is provided solely for

wireless devices with specific MAC addresses. For example, you can

specify the MAC address of each computer in your network so that only

those computers can access your wireless network.

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Configuring the Wireless Network

A Note About Wireless Security

Cisco RV120W Administration Guide

•

Enable encryption

Encryption protects data transmitted over a wireless network. Wi-Fi

Protected Access (WPA/WPA2) and Wired Equivalency Privacy (WEP) offer

different levels of security for wireless communication. Currently, devices

that are Wi-Fi certified are required to support WPA2, but are not required

to support WEP.

A network encrypted with WPA/WPA2 is more secure than a network

encrypted with WEP, because WPA/WPA2 uses dynamic key encryption.

To protect the information as it passes over the airwaves, you should enable

the highest level of encryption supported by your network equipment.

WEP is an older encryption standard and may be the only option available

on some older devices that do not support WPA.

•

Keep wireless routers, access points, or gateways away from exterior walls

and windows.

•

Turn wireless routers, access points, or gateways off when they are not

being used (at night, during vacations).

•

Use strong passphrases that are at least eight characters in length.

Combine letters and numbers to avoid using standard words that can be

found in the dictionary.

General Network Security Guidelines

Wireless network security is useless if the underlying network is not secure. Cisco

recommends that you take the following precautions:

•

Password protect all computers on the network and individually password

protect sensitive files.

•

Change passwords on a regular basis.

•

Install anti-virus software and personal firewall software.

•

Disable file sharing (peer-to-peer). Some applications may open file sharing

without your consent and/or knowledge.

Page 63 / 163

Configuring the Wireless Network

Understanding the Cisco RV120W’s Wireless Networks

Cisco RV120W Administration Guide

Understanding the Cisco RV120W’s Wireless Networks

The Cisco Small Business RV 120W Wireless-N VPN Firewall provides four

separate virtual wireless networks. These networks can be configured and

enabled with individual settings. You can set up the multiple networks to segment

the network traffic, to allow different levels of access, such as guest access, or to

allow access for different functions such as accounting, billing, and so on.

Configuring Basic Wireless Settings

The following sections contain information on how to configure basic wireless

settings on the Cisco RV120W. These settings apply to all of the wireless

networks.

Configuring Radio, Mode, and Channel Settings

STEP 1

Choose Wireless > Basic Settings.

STEP

In the Radio field, choose Enable to enable wireless functionality for the

Cisco RV120W. Choosing Disable turns off wireless functionality for the firewall.

STEP

In the Wireless Network Mode field, choose the type of wireless network based

on the devices you have that will connect to the network:

•

B/G Mixed—Select this mode if you have devices in the network that

support 802.11b and 802.11g.

•

G Only—Select this mode if all devices in the wireless network only

support 802.11g.

•

B/G/N Mixed—Select this mode if you have devices in the network that

support 802.11b, 802.11g and 802.11n.

•

N Only—Select this mode only if all devices in the wireless network

support 802.11n.

STEP

Select the channel bandwidth. Available choices depend on the wireless network

mode chosen in Step 3.

STEP

The Control Side Band field defines the sideband which is used for the secondary

or extension channel when the AP is operating in 40 Mhz channel width. Choose

lower or upper. This field is only available when channel spacing is set to auto. The

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Configuring the Wireless Network

Configuring Basic Wireless Settings

Cisco RV120W Administration Guide

signal components above the carrier frequency constitute the upper sideband

(USB) and those below the carrier frequency constitute the lower sideband (LSB).

STEP

The channel field specifies the frequency that the radio uses to transmit wireless

frames. Select a channel from the list of channels or choose auto to let the Cisco

RV120W determine the best channel to use based on the environment noise levels

for the available channels.

STEP

In the U-APSD field, choose Enable to enable the Unscheduled Automatic Power

Save Delivery (also referred to as WMM Power Save) feature that allows the radio

to conserve power. This feature is disabled by default.

STEP

Click Save.

Configuring Wireless Security and Other Settings

At a minimum, you should edit the default profiles to enable wireless security. See

A Note About Wireless Security, page 51

You can configure wireless security and other settings for each wireless network.

To configure wireless settings:

STEP 1

Choose Wireless > Basic Settings.

STEP

In the Wireless Basic Settings Table, check the box on the left of the wireless

network you want to configure.

STEP

Click Edit to configure these network properties:

Enter the SSID name, or the unique name for this wireless network. Include up

to 32 characters, using any of the characters on the keyboard. For added

security, you should change the default value to a unique name.

Check the Broadcast SSID box if you want to allow all wireless clients within

range to be able to detect this wireless network when they are scanning the

local area for available networks. Disable this feature if you do not want to make

the SSID known. When this feature is disabled, wireless users can connect to

your wireless network only if they know the SSID (and provide the required

security credentials).

Enter the VLAN, or network for this wireless network. (See Chapter 2,

Configuring Networking, for more information on VLANs.) Devices connecting

to this network are assigned addresses on this VLAN. The default VLAN is 1

and if all the devices are on the same network, this can be left unchanged.

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Configuring the Wireless Network

Configuring Basic Wireless Settings

Cisco RV120W Administration Guide

(Optional) Check the Wireless Isolation within SSID box to separate this

network from the other three networks on the Cisco RV120W. When this

feature is enabled, the network can communicate with the Cisco RV120W, but

not with any of the other networks.

In the Max Associated Clients field, enter the maximum number of endpoints

that can connect to this network. The default value is 8. You can change this

number if you want to restrict traffic on the network to prevent it from being

overloaded, for example. The number of clients connected across all four

virtual access points cannot exceed 100.

Click Save.

Configuring Security

STEP 1

Choose Wireless > Basic Settings.

STEP

In the Wireless Basic Settings Table, check the box on the left of the wireless

network you want to configure.

STEP

Click Edit Security Mode to configure security.

STEP

Select the SSID to configure.

STEP

Click Enable under Wireless Isolation within SSID to separate this network from

the other three wireless networks on the Cisco RV120W. When this feature is

enabled, the network can communicate with the Cisco RV120W, but not with any

of the other three networks.

STEP

In the Security field, select the type of security. All devices on this network must

use the same security mode and settings to work correctly. Cisco recommends

using the highest level of security that is supported by the devices in your

network.

•

Disabled—Any device can connect to the network. Not recommended.

•

Wired Equivalent Privacy (WEP)— Weak security with a basic encryption

method that is not as secure as WPA. WEP may be required if your network

devices do not support WPA; however, it is not recommended.

•

Wi-Fi Protected Access (WPA) Personal—WPA is part of the wireless

security standard (802.11i) standardized by the Wi-Fi Alliance and was

intended as an intermediate measure to take the place of WEP while the

802.11i standard was being prepared. It supports TKIP/AES encryption. The

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