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Page 61 / 237 Scroll up to view Page 56 - 60
Chapter 6 Wireless LAN
NBG-418N v2 User’s Guide
61
6.2
What You Can Do
Wireless screens vary according to the device mode you are using.
See
Chapter 4 on page 28
for more information on device modes.
•
Use the
General
screen to enable the Wireless LAN, enter the SSID and select the wireless
security mode (
Section 6.4 on page 63
).
•
Use the
MAC Filter
screen to allow or deny wireless stations based on their MAC addresses from
connecting to the NBG-418N v2 (
Section 6.5 on page 68
).
•
Use the
Advanced
screen to allow intra-BSS networking and set the RTS/CTS Threshold (
Section
6.6 on page 69
).
•
Use the
WPS
screen to quickly set up a wireless network with strong security, without having to
configure security settings manually (
Section 6.7 on page 69
).
•
Use the
WPS Station
screen to add a wireless station using WPS (
Section 6.8 on page 70
).
•
Use the
Scheduling
screen to set the times your wireless LAN is turned on and off (
Section 6.9
on page 71
).
•
Use the
MBSSID
screen to configure multiple wireless networks on the NBG-418N v2 (
Section
6.10 on page 72
).
•
Use the
AP Select
screen to choose an access point that you want the NBG-418N v2 (in
universal repeater mode) to connect to. You should know the security settings of the target AP
(
Section 6.11 on page 73
).
•
Use the
WLAN Information
screen to view the SSID and security of the selected AP wireless
network (
Section 6.12 on page 75
).
Wireless Screen
Router
Access Point
Universal Repeater
Client Bridge
General
MAC Filter
Advanced
WPS
WPS Station
Scheduling
MBSSID
AP Select
WLAN
Information
Page 62 / 237
Chapter 6 Wireless LAN
NBG-418N v2 User’s Guide
62
6.3
What You Should Know
Every wireless network must follow these basic guidelines.
•
Every wireless client in the same wireless network must use the same SSID.
The SSID is the name of the wireless network. It stands for Service Set IDentity.
•
If two wireless networks overlap, they should use different channels.
Like radio stations or television channels, each wireless network uses a specific channel, or
frequency, to send and receive information.
•
Every wireless client in the same wireless network must use security compatible with the AP.
Security stops unauthorized devices from using the wireless network. It can also protect the
information that is sent in the wireless network.
6.3.1
Wireless Security Overview
The following sections introduce different types of wireless security you can set up in the wireless
network.
6.3.2
MBSSID
Traditionally, you need to use different APs to configure different Basic Service Sets (BSSs). As well
as the cost of buying extra APs, there is also the possibility of channel interference. The NBG-418N
v2’s MBSSID (Multiple Basic Service Set IDentifier) function allows you to use one access point to
provide several BSSs simultaneously. You can then assign varying
security modes to different
SSIDs.
Wireless devices can use different BSSIDs to associate with the same AP.
6.3.2.1
Notes on Multiple BSSs
•
A maximum of eight BSSs are allowed on one AP simultaneously.
•
You must use different keys for different BSSs. If two wireless devices have different BSSIDs
(they are in different BSSs), but have the same keys, they may hear each other’s
communications (but not communicate with each other).
•
MBSSID should not replace but rather be used in conjunction with 802.1x security.
6.3.3
MAC Address Filter
Every wireless client has a unique identification number, called a MAC address.
1
A MAC address is
usually written using twelve hexadecimal characters
2
; for example, 00A0C5000002 or
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
1.
Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless networks. These kinds
of wireless devices might not have MAC addresses.
2.
Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.
Page 63 / 237
Chapter 6 Wireless LAN
NBG-418N v2 User’s Guide
63
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.
6.3.4
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.
For example, if users do not log in to the wireless network, you can choose no encryption, WEP,
WPA-PSK, or WPA2-PSK.
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 WPA2-PSK. Therefore, you should set up WEP in the wireless
network.
Note: It is recommended that wireless networks use WPA2-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.
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.
6.3.5
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 5.3 on page 46
.
6.4
General Wireless LAN Screen
Use this screen to enable the Wireless LAN, enter the SSID and select the wireless security mode.
Table 18
Types of Encryption for Each Type of Authentication
NO AUTHENTICATION
Weakest
No Security
Static WEP
WPA-PSK
Strongest
WPA2-PSK
Page 64 / 237
Chapter 6 Wireless LAN
NBG-418N v2 User’s Guide
64
Note: If you are configuring the NBG-418N v2 from a computer connected to the wireless
LAN and you change the NBG-418N v2’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-418N v2’s new
settings.
Click
Network
>
Wireless LAN
to open the
General
screen.
Figure 42
Network > Wireless LAN > General (Router or Access Point Mode)
Figure 43
Network > Wireless LAN > General (Universal Repeater Mode)
Page 65 / 237
Chapter 6 Wireless LAN
NBG-418N v2 User’s Guide
65
The following table describes the general wireless LAN labels in this screen.
See the rest of this chapter for information on the other labels in this screen.
6.4.1
No Security
Select
None
to allow wireless stations to communicate with the access points without any data
encryption.
Table 19
Network > Wireless LAN > General
LABEL
DESCRIPTION
WLAN STA
Information
This section is available only when the NBG-418N v2 is in universal repeater mode. This
shows the wireless and security settings of the selected AP wireless network.
SSID
This displays the Service Set IDentity of the wireless device to which you are connecting.
Security Mode
This displays the type of security configured on the wireless device to which you are
connecting.
Operating
Channel
This displays the channel used by the wireless device to which you are connecting.
WLAN AP
Information /
Wireless Setup
Use this section to configure the wireless settings between the NBG-418N v2and its wireless
clients.
Enable
Wireless LAN
Click the check box to activate wireless LAN.
802.11 Mode
Click the drop-down list to choose the
802.11 mode
you want to operate.
Name(SSID)
(Service Set IDentity) The SSID identifies the Service Set with which a wireless station is
associated. Wireless stations associating to the access point (AP) must have the same SSID.
Enter a descriptive name (up to 32 printable 7-bit ASCII characters) for the wireless LAN.
Enable SSID
Broadcast
Select the
Enable SSID Broadcast
check box to enable the SSID in the outgoing beacon
frame so a station cannot obtain the SSID through scanning using a site survey tool.
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-418N v2 is currently using.
Channel Width
Select whether the NBG-418N v2 uses a wireless channel width of
20MHz
,
40MHz
or
Auto
20/40MHz
. A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a
40MHz channel uses two standard channels and offers speeds of up to 300 Mbps. Because
not all devices support 40MHz channels, select
Auto 20/40MHz
to allow the NBG-418N v2
to adjust the channel bandwidth automatically.
Security
Use this section to configure the wireless security between the NBG-418N v2 and its wireless
clients.
Security Mode
Select
WEP
,
WPA-PSK(TKIP)
,
WPA-PSK(AES)
,
WPA2-PSK(TKIP)
,
WPA2-PSK(AES)
or
WPA-PSK/WPA2-PSK AES
to add security on this wireless network. The wireless clients
which want to associate to this network must have same wireless security settings as this
device. After you select to use a security, additional options appears in this screen. See
6.4.2
and
6.4.3
sections. Or you can select
None
to allow any client to associate this network
without authentication.
Apply
Click
Apply
to save your changes back to the NBG-418N v2.
Reset
Click
Reset
to reload the previous configuration for this screen.

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