ZyXEL Communications ZyXEL ZyWALL 2WG - Manual (Page 186)

Chapter 10 Wireless LAN
ZyWALL 2WG User’s Guide
186
The following table describes the labels in this screen.
Table 56 NETWORK > WIRELESS CARD
LABEL DESCRIPTION
Enable
Wireless Card
The wireless LAN through a wireless LAN card is turned off by default, before you
enable the wireless LAN you should configure some security by setting MAC filters
and/or 802.1x security; otherwise your wireless LAN will be vulnerable upon enabling
it. Select the check box to enable the wireless LAN.
Bridge to Select LAN to use the wireless card as part of the LAN.
Select DMZ to use the wireless card as part of the DMZ.
Select WLAN to use the wireless card as part of the WLAN.
The ZyWALL restarts after you change the wireless card setting.
Note: If you set the wireless card to be part of the LAN or DMZ, you
can still use wireless access. The firewall will treat the wireless
card as part of the LAN or DMZ respectively.
802.11 Mode Select 802.11b Only to allow only IEEE 802.11b compliant WLAN devices to
associate with the ZyWALL.
Select 802.11g Only to allow only IEEE 802.11g compliant WLAN devices to
associate with the ZyWALL.
Select 802.11b+g to allow both IEEE802.11b and IEEE802.11g compliant WLAN
devices to associate with the ZyWALL. The transmission rate of your ZyWALL might
be reduced.
Select 802.11a Only to allow only IEEE 802.11a compliant WLAN devices to
associate with the ZyWALL.
Choose
Channel ID
Set the operating frequency/channel depending on your particular region. To manually
set the ZyWALL to use a channel, select a channel from the drop-down list box. To
have the ZyWALL automatically select a channel, click Scan instead.
Scan Click this button to have the ZyWALL automatically select the wireless channel with
the lowest interference.
Super Mode Select this to improve data throughput on the WLAN by enabling fast frame and
packet bursting.
At the time of writing, this works only when the wireless client is using an Atheros card.
RTS/CTS
Threshold
This is the threshold (number of bytes) for enabling RTS/CTS handshake. Data with a
frame size larger than this value will perform the RTS/CTS handshake. Setting this
attribute to be larger than the maximum MSDU (MAC service data unit) size turns off
the RTS/CTS handshake. Enter a value between 256 and 2346.
If you select Super Mode, this field is grayed out and the ZyWALL uses 2346
automatically.
Fragmentation
Threshold
This is the threshold (number of bytes) for the fragmentation boundary for directed
messages. It is the maximum data fragment size that can be sent. Enter a value
between 256 and 2346.
If you select Super Mode, this field is grayed out and the ZyWALL uses 2346
automatically.
Output Power Set the output power of the ZyWALL in this field. If there is a high density of APs in an
area, decrease the output power to reduce interference with other APs. Select one of
the following 100% (full power), 50%, 25%, 12.5% or min (minimum). See the product
specifications for more information on your ZyWALL’s output power.
Enable
Roaming
Roaming allows wireless stations to switch from one access point to another as they
move from one coverage area to another. Select this checkbox to enable roaming on
the ZyWALL if you have two or more ZyWALLs on the same subnet.
Note: All APs on the same subnet and the wireless clients must have
the same SSID to allow roaming.