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Page 46 / 70 Scroll up to view Page 41 - 45
3.8
Wireless
Ubee Interactive
42
DDW3612 Subscriber User Guide
•
July, 2010
WPA
Wi-Fi Protected Access (WPA) is a subset of the IEEE
802.11i standard. Key differences between WPA and
WEP are user authentication and improved data
encryption.
WPA-PSK
If you don't have an external RADIUS server you should
use WPA-PSK (WPA Pre-Shared Key) that only requires
a single (identical) password entered into wireless
gateway and wireless client. As long as the passwords
match, a client will be granted access to the wireless
LAN.
WPA2
Advanced protocol, certified through Wi-Fi Alliance's
WPA2 program, implements the mandatory elements of
802.11i. In particular, it introduces a new AES-based
algorithm, CCMP, that is considered fully secure.
WPA2-PSK
If you don't have an external RADIUS server you should
use WPA2-PSK (WPA Pre-Shared Key) that only requires
a single (identical) password entered into wireless
gateway and wireless client. As long as the passwords
match, a client will be granted access to the wireless
LAN.
WPA/WPA2 Encryption
Switch to enable or disable WPA/WPA2 encryption.
WPA Pre-Shared Key
The encryption mechanisms used for WPA and WPA-PSK
are the same. The only difference between the two is that
WPA-PSK uses a simple common password, instead of
user-specific credentials. Refer to
page 4
for the default
value of the shared key.
RADIUS Server
Input the IP address of RADIUS server, if used.
RADIUS Port
Enter a RADIUS port number when WPA or 802.1x
network authentication is selected.
RADIUS Key
Enter the RADIUS Key when WPA or 802.1x network
authentication is selected.
Group Key Rotation Interval
Allows the wireless router to generate the best possible
random group key and update all the key-management
capable stations periodically.
WPA/WPA2 Re-auth Interval
Wireless router (if using WPA-PSK key management) or
RADIUS server (if using WPA key management) sends a
new group key out to all clients. The re-keying process is
the WPA equivalent of automatically changing the WEP
key for a wireless access point and all stations in the
WLAN on a periodic basis. Setting of the WPA Group Key
Update Timer is also supported in WPA-PSK mode.
Label
Description
Page 47 / 70
Ubee Interactive
3.8
Wireless
DDW3612 Subscriber User Guide
•
July, 2010
43
WEP Encryption
If you don’t have WPA(2)-aware wireless clients, then use
WEP key encrypting. A higher bit key offers better security.
WEP encryption scrambles the data transmitted between the
wireless stations and the DDW3612 Wireless Cable Modem
Gateway to keep network communications private. It encrypts
unicast and multicast communications in a network. Both the
wireless stations and the DDW3612 Wireless Cable Modem
Gateway must use the same WEP key. Data Encryption can
be set to WEP
128-bit, 64-bit,
or
Disable.
Shared Key Authentication
Shared Key is an authentication method used by wireless
LANs, which follow the IEEE 802.11 standard. Wireless
devices authenticate each other by using a secret key
that is kept by both devices.
802.1x Authentication
Enable to have the DDW3612 Wireless Cable Modem
Gateway authenticate wireless clients.
Network Key 1-4
You can pre-define up to 4 keys for 64-bit or 128-bit (64-
bit keys require 10 hexadecimal digits) (128-bit key
require 26 hexadecimal digits).
Current Network Key
You can select one of the four pre-defined keys as the
current network key.
Passphrase
You can set WEP encryption key by entering a word or
group of printable characters in the Passphrase box and
click Generate WEP keys. These characters are case
sensitive.
Generate WEP Keys
Force the wireless router to generate 4 WEP keys
automatically.
Apply
Click to save the wireless configurations.
Automatic Security
Configuration
Use this feature to setup WPS (Wifi Protected Setup) for
devices connecting to the wireless network.
Device Name
Enter a name for this wireless cable modem for WPS.
PIN
Enter the Personal Identification Number for this wireless
cable modem.
Configure
Click this button to apply the WPS-Device Name/PIN
Setup.
WPS Add Client/Push
Button/PIN
Select which method to have connecting wireless clients
connect to the wireless network, Push Button or PIN. If
PIN is selected, clients are required to enter the PIN in
order to access the wireless cable modem. For push
button, a client pushes a button, either on the device or in
software on the device, and then on the wireless cable
modem to establish secure communications.
Apply
Click Apply to save WPS configurations.
Label
Description
Page 48 / 70
3.8
Wireless
Ubee Interactive
44
DDW3612 Subscriber User Guide
•
July, 2010
3.8.3
Wireless - Access Control
The
Access Control
option allows you to configure what clients can access your
wireless network.
1.
Access the web interface. Refer to
page 7
, if needed.
2. Click the
Wireless
link from the top of the screen.
3. Click
Access Control
from the left side of the screen. The
Access Control
fields
are explained following this screen example.
Label
Description
Wireless Interface
Select the wireless interface in order to set access control
parameters.
MAC Restrict Mode
Use this feature to control wireless access to your network by
MAC address.
Select
Disable
to turn off MAC Restrictions and allow any
wireless client to connect to this wireless router. Note, however,
if you use other security mechanisms for access to the wireless
network, clients must still adhere to those restrictions.
Select
Allow
to create a list of wireless clients that can connect
to the wireless network. Enter the MAC Addresses of these
clients in the MAC Addresses fields. All MAC addresses not on
the list, will not be allowed access to your wireless network.
Select
Deny
to create a list of wireless clients that you do not
want to have access to your wireless network. Enter the MAC
Addresses of these clients in the MAC Addresses fields.
Page 49 / 70
Ubee Interactive
3.8
Wireless
DDW3612 Subscriber User Guide
•
July, 2010
45
3.8.4
Wireless - Advanced
The
Advanced
option allows you to configure data rates and WiFi thresholds.
Note:
This feature is available when logged into the device using the MSO user
login. Refer to
page 4
for more information.
1.
Access the web interface. Refer to
page 7
, if needed.
2. Click the
Wireless
link from the top of the screen.
3. Click
Advanced
from the left side of the screen. The
Advanced
fields are
explained following this screen example.
MAC Addresses
Input the MAC addresses. You may consider cutting and
pasting MAC addresses from the connected clients list at the
bottom of the screen.
Apply
Click to save.
Connected Clients
List of current connected Wireless client listed by MAC
address. Fields definitions are:
Age(s)
—The duration since the wireless client’s polled values
were sent to the wireless router. The values include all
information shown on this screen. The lower the number, the
more current its data.
RSSI(dBm)
—Received signal strength from the device to the
wireless cable modem. This value is commonly used to assist
in troubleshooting wireless performance issues. A signal
strength of -30dBm to -67dBm is considered optimal. Levels of
-67dBm and lower (e.g. -70, -80, etc.) will have a downward
impact on wireless data throughput. Refer to “Wireless Network
Deployment and Troubleshooting” on
page 52
for more
information.
IP Address
—The IP address assigned to this wireless client.
Host Name
—The host name of the wireless client.
Page 50 / 70
3.8
Wireless
Ubee Interactive
46
DDW3612 Subscriber User Guide
•
July, 2010
Label
Description
54g™ Network Mode
This field can only be set if 802.11-n Mode to set to
Off
in the
Radio screen as discussed on
page 39
. Select which network
mode in which to run DDW3612 Wireless Cable Modem
Gateway. The options are listed below:
54g auto, for self adaptive connection
54g performance, highest speed
54g LRS, for limited speed
802.11b, for connections to 11b clients only.
Basic Rate Set
Select the Basic Rate Set which is the rate that all wireless
clients must support in order to connect to the DDW3612
Wireless Cable Modem Gateway. The options are
All
and
Default
.
54g™ Protection
In
Auto
mode, the DDW3611 will use RTS/CTS to improve
802.1 1g performance in mixed 802.11 b/g networks. Turn
protection
Off
to maximize 802.11g throughput under most
conditions.
XPress™ Technology
XPress™
is a
standards-based frame-bursting approach to
improve 802.11g wireless LAN performance developed by
Broadcom. Select to
Enable
or
Disable
this feature.
Additional Information
:
When Xpress is turned on, aggregate throughput can improve
by up to 27% in 802.11g-only networks, and up to 75% in mixed
networks comprised of 802.11g and 802.11b standard
equipment.
Rate
Select Auto or select a specific data rate to limit the connection
rates of wireless clients.
Beacon Interval
Specify the Beacon Interval from 100 to 6553 5ms. This value
indicates the frequency interval of the beacon. A beacon is a
packet broadcast by the DDW3611 to keep the network
synchronized. A beacon includes information regarding the
wireless networks service area, the access point address, the
broadcast destination addresses, a time stamp, delivery traffic
indicator maps, and the Traffic Indicator Message (TIM).
DTIM Interval
Specify the DTIM interval from 3 to 255ms. This value indicates
how often the DDW3611 sends out a Delivery Traffic Indication
Message (DTIM). Lower settings result in more efficient
networking, while preventing your wireless clients from dropping
into power-saving sleep mode. Higher settings allow your
wireless clients to enter sleep mode, thus saving power, but
interferes with wireless transmissions.
Fragmentation
Threshold
Specify the fragmentation threshold packet size between 256-
2346 bytes. Fragmentation takes place when a packet’s size
exceeds the fragmentation threshold.
RTS Threshold
Specify the RTS threshold from 0 to 2347ms. This setting
determines how large a packet can be before the DDW3611
coordinates transmission and reception to ensure efficient
communication. This value should remain at its default setting of
2347 bytes. If you encounter inconsistent data flow, minor
modification to this setting is recommended.

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