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Page 91 / 292 Scroll up to view Page 86 - 90
Chapter 11 Wireless LAN
NBG-419N User’s Guide
91
00:A0:C5:00:00:02. To get the MAC address for each wireless client, see the appropriate User’s
Guide or other documentation.
You can use the MAC address filter to tell the AP which wireless clients are allowed or not allowed to
use the wireless network. If a wireless client is allowed to use the wireless network, it still has to
have the correct settings (SSID, channel, and security). If a wireless client is not allowed to use the
wireless network, it does not matter if it has the correct settings.
This type of security does not protect the information that is sent in the wireless network.
Furthermore, there are ways for unauthorized devices to get the MAC address of an authorized
wireless client. Then, they can use that MAC address to use the wireless network.
11.3.1.3
Encryption
Wireless networks can use encryption to protect the information that is sent in the wireless
network. Encryption is like a secret code. If you do not know the secret code, you cannot
understand the message.
The types of encryption you can choose depend on the type of user authentication.
Usually, you should set up the strongest encryption that every wireless client in the wireless
network supports. Suppose the wireless network has two wireless clients. Device A only supports
WEP, and device B supports WEP and WPA-PSK. Therefore, you should set up
WEP
in the wireless
network.
Note: It is recommended that wireless networks use
WPA-PSK
or stronger encryption.
IEEE 802.1x and WEP encryption are better than none at all, but it is still possible
for unauthorized devices to figure out the original information pretty quickly.
When you select
WPA2-PSK
in your NBG-419N, you can also select an option (
WPA Compatible
)
to support WPA as well. In this case, if some wireless clients support WPA and some support WPA2,
you should set up
WPA2-PSK
(depending on the type of wireless network login) and select the
WPA Compatible
option in the NBG-419N.
Many types of encryption use a key to protect the information in the wireless network. The longer
the key, the stronger the encryption. Every wireless client in the wireless network must have the
same key.
11.3.1.4
WPS
WiFi Protected Setup (WPS) is an industry standard specification, defined by the WiFi Alliance. WPS
allows you to quickly set up a wireless network with strong security, without having to configure
security settings manually. Depending on the devices in your network, you can either press a
button (on the device itself, or in its configuration utility) or enter a PIN (Personal Identification
Number) in the devices. Then, they connect and set up a secure network by themselves. See how
to set up a secure wireless network using WPS in the
Section 10.3 on page 79
.
Table 35
Types of Encryption for Each Type of Authentication
NO AUTHENTICATION
Weakest
No Security
WEP
WPA-PSK
Strongest
WPA2-PSK
Page 92 / 292
Chapter 11 Wireless LAN
NBG-419N User’s Guide
92
11.3.1.5
WDS
Wireless Distribution System or WDS security is used between bridged APs. It is independent of the
security between the wired networks and their respective APs. If you do not enable WDS security,
traffic between APs is not encrypted. When WDS security is enabled, both APs must use the same
pre-shared key.
11.4
General Wireless LAN Screen
Use this screen to enable the Wireless LAN, enter the SSID and select the wireless security mode.
Note: If you are configuring the NBG-419N from a computer connected to the wireless
LAN and you change the NBG-419N’s SSID, channel or security settings, you will
lose your wireless connection when you press
Apply
to confirm. You must then
change the wireless settings of your computer to match the NBG-419N’s new
settings.
Click
Network
>
Wireless LAN
to open the
General
screen.
Figure 67
Network > Wireless LAN > General
The following table describes the general wireless LAN labels in this screen.
Table 36
Network > Wireless LAN > General
LABEL
DESCRIPTION
Wireless Setup
Wireless LAN
This is turned on by default.
You can turn the wireless LAN on or off using the switch at the rear panel of the
NBG-419N. The current wireless state is reflected in this field.
Network
Name(SSID)
(Service Set IDentity) The SSID identifies the Service Set with which a wireless
station is associated. Wireless stations associating to the NBG-419N must have the
same SSID. Enter a descriptive name (up to 32 keyboard characters) for the
wireless LAN.
Hide SSID
Select this check box to hide the SSID in the outgoing beacon frame so a station
cannot obtain the SSID through scanning using a site survey tool.
Page 93 / 292
Chapter 11 Wireless LAN
NBG-419N User’s Guide
93
See the rest of this chapter for information on the other labels in this screen.
11.4.1
No Security
Select
No Security
to allow wireless stations to communicate with the access points without any
data encryption.
Note: If you do not enable any wireless security on your NBG-419N, your network is
accessible to any wireless networking device that is within range.
Figure 68
Network > Wireless LAN > General: No Security
Channel
Selection
Set the operating frequency/channel depending on your particular region.
Select a channel from the drop-down list box. The options vary depending on the
frequency band and the country you are in.
Refer to the Connection Wizard chapter for more information on channels. This
option is only available if
Auto Channel Selection
is disabled.
Operating
Channel
This displays the channel the NBG-419N is currently using.
Security
Security Mode
Select
WEP
,
WPA-PSK
or
WPA2-PSK
to add security on this wireless network.
The wireless clients which want to associate to this network must have same
wireless security settings as the NBG-419N. After you select to use a security,
additional options appears in this screen. See
11.4.2
and
11.4.3
sections.
Or you can select
No Security
to allow any client to associate this network without
authentication.
Note: If you enable the WPS function, only
No Security
,
WPA-PSK
and
WPA2-PSK
are available in this field.
Apply
Click
Apply
to save your changes back to the NBG-419N.
Reset
Click
Reset
to reload the previous configuration for this screen.
Table 36
Network > Wireless LAN > General
LABEL
DESCRIPTION
Page 94 / 292
Chapter 11 Wireless LAN
NBG-419N User’s Guide
94
The following table describes the labels in this screen.
Refer to
Table 36 on page 92
for descriptions of the other labels in this screen.
11.4.2
WEP Encryption
WEP encryption scrambles the data transmitted between the wireless stations and the access points
to keep network communications private. It encrypts unicast and multicast communications in a
network. Both the wireless stations and the access points must use the same WEP key.
Your NBG-419N allows you to configure up to four 64-bit or 128-bit WEP keys but only one key can
be enabled at any one time.
Table 37
Network > Wireless LAN > General: No Security
LABEL
DESCRIPTION
Security Mode
Choose
No Security
from the drop-down list box.
Apply
Click
Apply
to save your changes back to the NBG-419N.
Reset
Click
Reset
to reload the previous configuration for this screen.
Page 95 / 292
Chapter 11 Wireless LAN
NBG-419N User’s Guide
95
In order to configure and enable WEP encryption, click
Network
>
Wireless LAN
to display the
General
screen. Select
Static WEP
from the
Security Mode
list.
Figure 69
Network > Wireless LAN > General: Static WEP
The following table describes the wireless LAN security labels in this screen.
Table 38
Network > Wireless LAN > General: Static WEP
LABEL
DESCRIPTION
Security Mode
Select
Static WEP
to enable data encryption.
PassPhrase
Enter a Passphrase (up to 26 printable characters) and click Generate.
A passphrase functions like a password. In WEP security mode, it is further
converted by the NBG-419N into a complicated string that is referred to as the
“key”. This key is requested from all devices wishing to connect to a wireless
network.
WEP
Encryption
Select
64-bit WEP
or
128-bit WEP
.
This dictates the length of the security key that the network is going to use.

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