Network Computing: Always-On WLAN Monitor

“I tested Guard 3.0 in our Syracuse University Real-World Labs.
The setup was simple. I powered on the rack-mountable server
appliance and accessed the Java Web management console after
configuring a few parameters using the command-line interface. The
server runs on a customized version of Red Hat Linux and uses
PostgreSQL to store information fed to it over Ethernet from the
wireless sensors.

“I also had to install Java Runtime Environment (JRE) 1.4.1 Java
HotSpot Client Virtual Machine (free from Sun Microsystems).

“Guard comes with two wireless sensors that run an embedded
Linux OS and include Cisco Systems’ Aironet 350 and Ethernet
interfaces. Determining the appropriate number of sensors required
for complete coverage and their optimum location in your facility
requires time and effort. AirDefense estimates that a sensor
typically covers a 1,000-foot radius, but I could test it only up
to 170 feet due to the lab building’s physical constraints…”

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