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5.4

Dynamic DNS

Dynamic Domain Name System (DNS) is a mechanism used for translating host

names for network nodes into IP addresses in real-time. This page allows enabling

the Dynamic DNS and selecting the service provider.

The Dynamic DNS page includes the following parameters:



Enable DDNS

- Select this check-box if the unit has a non-static IP address to

keep the domain name associated with an ever-changing IP address.

When DDNS is enabled, configure the following parameters:

»

DDNS User Name

»

DDNS Password

»

DDNS Host Name



DDNS Service Provider

- Select the DDNS service provider from the

drop-down list (Default: www.dyndns.org).

Figure 5-3: Internet - Dynamic DNS

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5.5

WiFi

Some BreezeMAX Si 4000 models include IEEE 802.11b/g radio interfaces for

local Wi-Fi communications. The Wi-Fi set up pages include configuration options

for the radio signal characteristics and Wi-Fi security.

5.5.1

Wireless Settings

The Wireless Settings page includes the following parameters:



Interface status

- Enables/disables the Wi-Fi radio



Country Code

–The parameter set (list of parameters per country regulations)

by which various parameters are defined (Read-only).



Network Name (SSID)

– The Service Set ID (SSID) that identifies the Wi-Fi

network. The SSID is case sensitive and can consist of up to 32 alphanumeric

characters. (Default: default)



Radio Channel

– The radio channel used by the unit and its clients to

communicate with each other. This channel must be the same on the unit and

Figure 5-4: Internet WiFi

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all of its wireless clients. The available channel settings are limited by local

regulations. (Default: 1; Range: 1-14, Auto).



Working mode

- The 802.1x authentication is an addition to the WLAN

security methods. It provides a method to protect the network behind the

access point from intruders as well as provide dynamic keys and strengthen

WLAN encryption. (Range: 802.11b, 802.11g, 802.11b/g, Default:802.11b/g)



Transmit Power

– The power of the radio signals transmitted from the unit.

The higher the transmission power, the farther the transmission range. Only

Full power is available.



RTS Threshold

– Sets the packet size threshold at which a Request to Send

(RTS) signal must be sent to a receiving station prior to sending the data

frame. The unit sends RTS frames to a receiving station to negotiate the

sending of a data frame. After receiving an RTS frame, the station sends a CTS

(clear to send) frame to notify the unit that it can start sending data. If a

packet size equals or exceeds the RTS threshold, the RTS/CTS (Request to

Send/Clear to Send) mechanism will be enabled. Units contending for the

medium may not be aware of each other, and the RTS/CTS mechanism can

solve this “Hidden Node Problem.” (Range: 256-2432 bytes: Default: 2432

bytes)

NOTE

If you experience poor performance, you may be encountering interference from another wireless

device. Try changing the channel, as this may eliminate interference and increase performance.

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

CTS Protect Mode

– When 802.11g and 802.11b clients operate together in

the same Wi-Fi network, there needs to be a mechanism that prevents

802.11b clients from interfering with 802.11g transmissions. This is achieved

by sending 802.11b-compatible CTS (Clear to Send) or RTS/CTS (Request to

Send / Clear to Send) frames before each transmission. This mechanism

decreases the performance of 802.11g clients, but ensures that 802.11b

clients can communicate with the BreezeMAX Si 4000. (Default: Auto)

»

Always off

: If there are no 802.11b clients in the network, the protection

mode can be disabled.

»

Always on

: The transmitting client sends a CTS frame to prevent others

from accessing the medium. This mechanism is effective for most networks

with mixed 802.11g and 802.11b clients.

»

Auto

: Both RTS and CTS frames must be exchanged before a client can

send data. There may be 802.11b clients in some networks that do not

detect the CTS frames from other stations. The full RTS/CTS exchange

should solve most connection problems, but it also has the greatest impact

on network performance.



Preamble Length

– All IEEE 802.11 frames begin with an alternating pattern

of 1s and 0s called the preamble, which tells receiving stations that a frame is

arriving. This provides time for the receiving station to synchronize to the

incoming data stream. This parameter sets the length of the signal preamble

that is used at the start of a data transmission. Using a short preamble

instead of a long preamble can increase data throughput on the unit, but

requires that all clients can support a short preamble. (Default: Short)

»

Short

: Sets the preamble to short (96 microseconds) for increased

throughput.

»

Long

: Sets the preamble to long (192 microseconds. Using a long preamble

ensures the unit can support all 802.11b and 802.11g clients.



SSID Suppress

– The unit is configured by default as an “open system,” which

broadcasts a beacon signal including the configured SSID. Wireless clients

with a configured SSID of “ANY” can read the SSID from the beacon, and

automatically set their SSID for immediate connection to the BreezeMAX Si

4000. When enabled, the unit does not include its SSID in beacon messages.

This provides a basic level of security, since wireless clients must be

configured with the SSID to connect to the BreezeMAX Si 4000.

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5.5.2

Wireless Security

The BreezeMAX Si 4000 Wi-Fi interface is configured by default as an “open

system,” which broadcasts a beacon signal including the configured SSID (Service

Set ID). Wireless clients with a configured SSID of “ANY” can read the SSID from

the beacon, and automatically set their SSID to allow immediate connection to the

wireless network.

To implement wireless network security, you have to employ two main functions:



Authentication

– It must be verified that clients attempting to connect to the

network are authorized users. (Default mode is WPA-PSK, see

“WPA/WPA2

Security” on page 62

)



Traffic Encryption

– Data passing between the unit and clients must be

protected from interception and eavesdropping.

For a more secure network, the BreezeMAX Si 4000 can implement one of several

security mechanisms. The security mechanism employed depends on the level of

security required, the network and management resources available, and the

software support provided on wireless clients.

There are eight security options available. When you select the security type from

the list, the required settings are displayed. The option “Open System” together

with encryption disabled is equivalent to no security, all clients will be able to

immediately connect to the Wi-Fi network.

The following sections describe the security options available for the BreezeMAX

Si 4000Wi-Fi network.

5.5.2.1

802.1x

The 802.1x authentication is an addition to the WLAN security methods. It

provides a method to protect the network behind the access point from intruders

as well as provide for dynamic keys and strengthen WLAN encryption.

You can set the following:



Rekey Interval - Interval in seconds between renewals of authentication key

(Default: 3600)



RADIUS Server



RADIUS Port (Default: 1812)