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Auto
option should be enabled in order to establish WDS connection between Access
Points if
WDS Peers
are not specified (applicable for AP WDS mode only). If
Auto
option is enabled AirOS powered Access Point will choose WDS Peers according to the
SSID setting.
Note: Access Point operating in WDS mode and all the WDS Peers must operate on the
same frequency
channel
and use the same
channel spectrum width
.
SSID
: Service Set Identifier used to identify your 802.11 wireless LAN should be
specified while operating in
Access Point
mode. All the client devices within range will
receive broadcast messages from the access point advertising this SSID.
ESSID
: –
specify the ESSID of the Access Point which the the AirOS should associate to while
operating in
Station
or
Station WDS
mode. There can be several Access Points with the
same ESSID. If the ESSID is set to "Any" the
station
will connect to any available AP.
Site Survey tool for the Access Point selection
The list of the available Access Points can be retrieved using the
Select
button, which
activates
Site Survey
tool with the AP selection functionality. Site Survey will search for
the available wireless networks in range on all the supported channels and will allow
you to select one for association. In case the selected network uses encryption, you’ll
need to set security parameters in wireless security section. Select the Access Point
from the list and click
Select
button for association.
Click
Scan
button to refresh the list of available wireless networks.
Close this window
button closes Site Survey tool window.
Site Survey channel scan list can be modified using the
Channel Scan List
control.
Channel Scan list selection on Nanostation5
Channel Scan List
: This will confine scanning only to frequencies selected (applicable
for Station and Station WDS modes only). The benefits of this are faster scanning as
well as filtering out unwanted AP's in the results. Site Survey tool will look for the
Access Points in selected channels only.
Channel list management for the selected IEEE 802.11 mode and specified Channel
Spectrum Width can be enabled by selecting the
Enabled
option. There are two ways
to set the Channel Scan List - enumerating the required channels (separated by
comma) in the input field or using the selection window which is activated using the
Edit
button.
Hide SSID
control will disable advertising the SSID of the access point in broadcast
messages to wireless stations. Unselected control will make SSID visible during
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network scans on the wireless stations. Control is available while operating in
Access
Point
mode only.
Lock to AP MAC
: This allows the station to always maintain connection to a specific
AP with a specific MAC (applicable for Station and Station WDS modes only). This is
useful as sometimes there can be few identically named SSID's (AP's) with different
MAC addresses. With AP lock on, the station will lock to MAC address and not roam
between several Access Points with the same ESSID.
Country Code
: Different countries will have different power levels and possible
frequency selections. To ensure device operation follows regulatory compliance rules,
please make sure to select your correct country where device will be used. The
channel list, output power limits, IEEE 802.11 and Channel Spectrum Width modes will
be tuned according to the regulations of the selected country. Additionally, please
consult
compliance guide
for further explanation of international compliance
requirements.
IEEE 802.11 Mode
: This is the radio standard used for operation of your AirOS
powered device. 802.11b is an older 2.4GHz mode while the 802.11g (2.4GHz) and
802.11a (5GHz) are newer standards based on faster Othogonal Frequency Division
Multiplexing (OFDM) modulation. For more information, please consult 802.11
compliance guide
.
PowerStation2/LiteStation2/Nano Station2 supported IEEE 802.11 modes:
B only
– connect to a 802.11b only network.
B/G Mixed
– connect to a 802.11b or 802.11g network (selected by default).
G only
– connect to a 802.11g only network.
PowerStation5/LiteStation5/Nano Station5 supported IEEE 802.11 modes:
A
– connect to a 802.11a network (selected by default).
Channel Spectrum Width
: This is spectral width of the radio channel. Supported
wireless channel spectrum widths:
5MHz
– is the channel spectrum with the width of 5 MHz (known as Quarter-
Rate mode).
10MHz
– is the channel spectrum with the width of 10 MHz (known as Half-
Rate mode).
20MHz
– is the standard channel spectrum width (selected by default).
40MHz
– the widest channel spectrum width required to connect to a 802.11a
network which supports Static Turbo feature (applicable for
PowerStation5/LiteStation5/Nano Station5 only).
Reducing spectral width provides 2 benefits and 1 drawback.
Benefit 1: It will increase the amount of non-overlapping channels. This can
allow networks to scale better
Benefit 2: It will increase the PSD (power spectral Density) of the channel and
enable the link distance to be increased
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Drawback: It will reduce throughput proportional to the channel size reduction.
So just as turbo mode (40MHz) increases possible speeds by 2x, half specrtrum
channel (10MHz), will decrease possible speeds by 2x.
Channel Shifting
: option enables the special channels which have the frequency
offset from the standard 802.11b/g and 802.11a channels. This is a proprietary Ubiquiti
developed feature. While 802.11 networks have standard channels such as Channel 1
(2412MHz), Channel 2 (2417MHz), etc. spaced every 5MHz apart; channel shifting will
allow operation of new non-802.11 channels offset from the standard channels. The
benefits of this are private networking and inherent security. Using channel-shifting,
networks can instantly become invisible to the millions of wifi devices in the world.
Channel
: select the wireless channel while operating in
Access Point
mode. Multiple
frequency channels are available to avoid interference between nearby access points.
The channel list varies depending on the selected country code, IEEE 802.11 mode,
Channel Spectrum Width and Channel Shifting option.
Output Power
: This will configure the maximum average transmit output power (in
dBm) of the wireless device. The output power at which wireless module transmits
data can be specified using the slider. When entering output power value manually,
the slider position will change according to the entered value. The transmit power level
that is actually used is limited to the maximum value allowed by your country's
regulatory agency. Note: In case of NanoStation, this is the output power delivered to
the internal Antennas.
Obey regulatory power
box must be always checked. While checked transmit output
power will be tuned according to the regulations of the selected country.
Data Rate
: This defines the data rate (in Mbps) at which the device should transmit
wireless packets. If the
Auto
check box is enabled, then the
rate algorithm
will select
the best data rate depending on the link quality conditions. If a data rate below
54Mbps is selected while the
Auto
rate selection is enabled, then the selected data rate
will become the maximum data rate that can be used. Use
Auto
option if you are
having trouble getting connected or losing data at a higher rate. In this case the lower
data rates will be used by device automatically.
Refer to the section
Advanced Wireless Settings
for the detailed information about
rate
algorithms
.
Wireless Security
This section enables you to set parameters that control how the subscriber station
associates to a wireless device and encrypts/decrypts data.
Station Wireless Security Settings
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Choose the security method according to the Access Point security policy. Subscriber
station should be authorized by Access Point in order to get access to the network and
all the user data transferred between subscriber station and Access Point will be
encrypted if the wireless security methods are used.
Security
: AirOS supports all the popular 802.11 security options such as WEP, WPA,
and WPA2. Select the security mode of your wireless network:
WEP
– enable WEP encryption. WEP (Wired Equivalent Privacy) is based on the
IEEE 802.11 standard and uses the RC4 encryption algorithm. Enabling WEP
allows you to increase security by encrypting data being transferred over your
wireless network. WEP is the oldest security algorithm.
WPA
– enable WPA™ security mode. Wi-Fi Protected Access - WPA™ (IEEE
802.11i/D3.0) and WPA2™ (IEEE 802.11i) with pre-shared key management
protocol offers improved security methods as they are new protocols that were
created under the 802.11i standard to address weaknesses in the WEP
approach.
WPA
™ and
WPA2
™ support the following ciphers for data encryption:
TKIP
- Temporal Key Integrity Protocol which uses RC4 encryption algorithm.
CCMP
- Counter Mode with Cipher Block Chaining Message Authentication Code
Protocol which uses the Advanced Encryption Standard (AES) algorithm.
The device will use the strongest cipher (CCMP) in Station and Access Point wireless
mode by default. If CCMP is not supported on the other side of the link the TKIP
encryption will be used - like in situation when the device acts as Access Point with
WPA security enabled and at least one wireless station (without CCMP support) is
connected to it.
WPA-TKIP
– enable WPA™ security mode with TKIP support only.
WPA-AES
– enable WPA™ security mode with AES support only.
WPA2
– enable WPA2™ security mode.
WPA2-TKIP
– enable WPA2™ security mode with TKIP support only.
WPA2-AES
– enable WPA2™ security mode with AES support only.
Authentication Type
: field relates only to the WEP security option. One of the
following authentication modes should be selected if WEP security method is used:
Open Authentication
– station is authenticated automatically by AP (selected by
default).
Shared Authentication
– station is authenticated after the challenge, generated
by AP.
WEP Key Length
: 64-bit (selected by default) or 128-bit WEP Key length should be
selected if WEP security method is used. The
128-bit
option will provide more security.
Key Type
:
HEX
(selected by default) or
ASCII
option specifies the character format for
the WEP key if WEP security method is used.
WEP Key
: WEP encryption key for the wireless traffic encryption and decryption
should be specified if WEP security method is used:
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For
64-bit
– specify WEP key as 5 HEX (0-9, A-F or a-f) pairs (e.g. 00112233AA)
or 5 ASCII characters.
For
128-bit
– specify WEP key as 13 HEX (0-9, A-F or a-f) pairs (e.g.
00112233445566778899AABBCC) or 13 ASCII characters.
Key Index
: specify the Index of the WEP Key used.
WPA Authentication
: one of the following WPA™ key selection methods should be
specified if WPA™ or WPA2™ security method is used (applicable for
Station
and
Station WDS
modes only). :
PSK
– WPA™ or WPA2™ with Pre-shared Key method (selected by default).
EAP
– WPA™ or WPA2™ with EAP (Extensible Authentication Protocol) IEEE
802.1x authentication method. This method is commonly used in Enterprise
networks.
WPA Pre-shared Key
: the pass phrase for WPA™ or WPA2™ security method should
be specified if the
Pre-shared Key
method is selected. The pre-shared key is an alpha-
numeric password between 8 and 63 characters long.
Access Point Wireless Security Settings
MAC ACL
: MAC Access Control List (ACL) provides ability to allow or deny certain
clients to connect to the AP (applicable for AP and AP WDS modes only).
MAC ACL can be enabled by selecting the
Enabled
option.
There are two ways to set the Access Control List:
define certain wireless clients in the list which will have granted access to the
Access Point while the access will be denied for all the remaining clients - MAC
ACL
Policy
is set to
Deny
.
define certain wireless clients in the list which will have denied access to the
Access Point while the access will be granted for all the remaining clients - MAC
ACL
Policy
is set to
Allow'.
The MAC addresses of the wireless clients can be added and removed to the list using
the
Add
and
Remove
buttons.
Note: MAC Access Control is the weakest security approach. WPA™ or WPA2™ security
methods shoud be used when possible.
Click
Change
button to save the changes.
Network

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