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Configure Tab
104
NXA-WAPZD1000 ZoneDirector Smart WLAN Controller
2.
Review and change the following self-healing options:
Automatically adjust AP radio power to optimize coverage where interference is present: If this
capability is activated and the Tx power of a radio is Auto, the AP’s transmit power will be
automatically reduced or maximized to provide the best wireless service.
Automatically adjust AP channel when interference is detected: If interference of any kind is
detected in an AP, the radio frequency will be switched automatically.
3.
Click the Apply button in the same section to save your changes. The NXA-WAPZD1000 issues
necessary AP power and/or channel updates at 10 minute intervals.
Configuring Intrusion Prevention Options
The NXA-WAPDZD1000 has built-in intrusion prevention features that help protect the wireless network from
excessive requests and intrusion attempts.
To configure the intrusion prevention options:
1.
Go to Configure > Services.
2.
In the Intrusion Prevention section, configure the following settings:
Protect my wireless network against excessive wireless requests: If this capability is activated,
excessive 802.11 probe request frames and management frames launched by malicious attackers
will be discarded.
Temporarily block wireless clients with repeated authentication failures for [ ] seconds: If this
capability is activated, any clients that repeatedly fail in attempting authentication will be
temporarily blocked for a period of time. Default is 30 seconds.
3.
Click the Apply button in the same section to save your changes.
Configuring Background Scanning
As a key element of your network monitoring, the NXA-WAPDZD1000 regularly samples the activity in all
Access Points to assess radio frequency (RF) usage, to detect rogue APs and to determine which APs are near
each other for mesh optimization.
These scans sample one channel at a time in each AP, so as not to interfere with network use. This information
is then applied in Map View (page 27) and other NXA-WAPDZD1000 monitoring features. You can, if you
prefer, customize the automatic scanning of RF activity, deactivate it if you feel it's not helpful, or adjust the
frequency, if you want scans at greater or fewer intervals. Note that background scanning must be enabled for
the NXA-WAPDZD1000 to detect rogue APs and rogue DHCP servers on the network.
To configure background scanning:
1.
Go to Configure > Services.
2.
In the Background Scanning section, configure the following options:
Run background scan every [ ]: Select this check box, and then type the time interval (in seconds,
default is 20) that you want to set between each scan. If you want to disable background scanning,
clear the check box; this should result in a minor increase in AP performance, but removes the
detection of rogue APs from NXA-WAPDZD1000 monitoring. You can also decrease the scan
frequency, as less frequent scanning improves overall AP performance.
Report rogue devices in ZD event log: Select this check box if you want the NXA-WAPDZD1000 to
record details about detected rogue devices to its event logs.
3.
Click the Apply button that is in the same section to save your settings.
To see whether background scanning is enabled or disabled for a particular AP, go to Monitor > Access
Points, and click on the AP’s MAC address. The access point detail screen displays the background scanning
status for each radio.
Enabling Rogue DHCP Server Detection
A rogue DHCP server is a DHCP server that is not under the control of network administrators and is therefore
unauthorized. When a rogue DHCP server is introduced to the network, it could start assigning invalid IP
You can also disable background scanning on a per-WLAN basis from the
Configure
> WLANS
page. To disable scanning for a particular WLAN, click the
Edit
link next to
the WLAN for which you want to disable scanning, open
Advanced Options,
and click
the check box next to
Disable Background Scanning
.
Summary of Contents for NXA-WAPZD1000
Page 4: ......
Page 12: ...viii NXA WAPZD1000 ZoneDirector Smart WLAN Controller Table of Contents ...
Page 16: ...Introduction 12 NXA WAPZD1000 ZoneDirector Smart WLAN Controller ...
Page 130: ...Blocking Client Devices 126 NXA WAPZD1000 ZoneDirector Smart WLAN Controller ...
Page 146: ...Smart Mesh Networking Best Practices 142 NXA WAPZD1000 ZoneDirector Smart WLAN Controller ...
Page 153: ...Troubleshooting 149 NXA WAPZD1000 ZoneDirector Smart WLAN Controller ...