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Wireless Network
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51
Wireless Network
Wireless Channel
—
Select the channel you want to use. All devices in your wireless
network must use the same channel in order to communicate. If you do not select a
particular channel number, the default setting will be Auto-scan Channel in which
case the residential gateway scans the network and chose the channel with the least
interference.
Wireless Network State
—
Select the wireless standards running on your network. If
you have Wireless-G and Wireless-B devices in your network, keep the default,
Mixed. If you have only Wireless-G devices, select G-Only. If you have only
Wireless-B devices, select B-Only. If you do not have any wireless devices, select
Disabled.
The Gateway supports up to four wireless networks. By default, only the first
wireless network is enabled. On the Wireless Security and MAC Filter screens, you
can configure different security settings and MAC filtering rules for each wireless
network.
Configure the following settings for each wireless network (SSID1-4):
Wireless Network Name (SSID)
—
The network name is case-sensitive and must
not exceed 32 characters (use any of the characters on the keyboard). Cisco
recommends that you change the default name of the first network to a unique
name of your choice.
Wireless Network State
—
If you want to use the wireless network, select
Enabled
. Otherwise, select
Disabled
.
Wireless SSID Broadcast
—
When wireless devices survey the local area for
wireless networks to associate with, they will detect the wireless network name
or SSID broadcast by the Gateway.
If you want to broadcast the residential
gateway’s SSID, keep the default,
Enabled
. Otherwise, select
Disabled
.
Click
Save Settings
to apply your changes, or click
Cancel Changes
to cancel your
changes.
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Chapter 4
Wireless
52
3425-00669 Rev E
Security
The Wireless Security screen configures the security of your wireless network(s). The
gateway supports the following wireless security mode options:
Wi-Fi Protected Access (WPA)-Personal
WPA2-Personal
Wired Equivalent Privacy (WEP)
WPA-Enterprise
WPA2-Enterprise
WPA is a stronger security standard than WEP encryption.
Note
: If you used Wi-Fi Protected Setup to configure your wireless network(s),
wireless security has already been set up. Do not make changes to the Security
screen.
Path:
Wireless > Security
Wireless Network
—
Select the wireless network you want to configure.
Security Mode
—
Select the security method for your wireless network. Proceed to
the appropriate instructions. If you do not want to use wireless security, keep the
default,
Off
.
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Security
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53
Note:
If you are using wireless security, remember that each device in your wireless
network MUST use the same security method and settings, or else the wireless
devices cannot communicate.
Wireless Security Checklist
Wireless networks are convenient and easy to install, so homes with high-speed
Internet access are adopting them at a rapid pace. Because wireless networking
operates by sending information over radio waves, it can be more vulnerable to
intruders than a traditional wired network. Like signals from your cellular or
cordless phones, signals from your wireless network can also be intercepted. 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. Cisco wireless products use
wag310g
as the default wireless
network name. 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 Cisco default password is 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 home so
that only those computers can access your wireless network.
Enable Encryption
Encryption protects data transmitted over a wireless network. Wi-Fi Protected
Access (WPA/WPA2) and Wired Equivalent Privacy (WEP) offer different levels of
security for wireless communication.
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Chapter 4
Wireless
54
3425-00669 Rev E
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.
General Network Security Guidelines
Wireless network security is useless if the underlying network is not secure.
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.
Additional Security Tips
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.
Allowable Character Sets:
–
Username and SSID may contains letters, numbers, and/or special
characters EXCEPT:
Spaces or tabs
&, `, (, ), <, or > character
Consecutive underscores __
An underscore_, dash -, or period . at the beginning
–
Password may contain any letters, numbers, and/or special characters
EXCEPT spaces or tabs
–
Other fields as string type could be any string
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Security
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55
WPA2-Personal
Mixed Mode
—
Select Enabled to support both WPA and WPA2 clients. Otherwise,
keep the default, Disabled.
Encryption
—
Select the appropriate method, AES or TKIP or both.
Passphrase
—
Enter a Passphrase (also called a WPA shared key) of 8-63 characters.
Key Renewal
—
Enter a Key Renewal period, which instructs the residential gateway
how often it should change the encryption keys. The default is 3600 seconds.
WPA-Personal
Encryption TKIP is automatically selected.
Passphrase
—
Enter a Passphrase (also called a WPA shared key) of 8-63 characters.
Key Renewal
—
Enter a Key Renewal period, which instructs the Gateway how often
it should change the encryption keys. The default is 3600 seconds.
WEP
Encryption
—
Select a level of WEP encryption, 40/64-bit (10 hex digits) or 104/128-
bit (26 hex digits).
Passphrase
—
Enter a Passphrase to automatically generate WEP keys. Then click
Generate
.
Note:
The WEP Passphrase is compatible with Cisco wireless products only. If you
are using non-Cisco products, manually enter the appropriate WEP key on those
devices.
Key 1-4
—
If you did not enter a Passphrase, enter the WEP key(s) manually.
TX Key
—
Select which TX (Transmit) Key to use. The default is 1.

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