Wireless monitor extends to 802.11g networks

Security monitors are scarce for the rapidly proliferating IEEE 801.11b wireless networks, not to mention the newer a and g WiFi flavors. The AirDefense 3.5 security and monitoring system from AirDefense Inc. of Alpharetta, Ga., can simultaneously monitor all three LAN types.

Its remote sensors look for suspicious activities by setting up parent-child relationships between specified access points and WiFi clients at 2.4- and 5-GHz frequencies. AirDefense consists of a dedicated server running proprietary software plus a security policy or list of parameters that set off an alarm.

If a policy violation occurs, AirDefense Guard tries to reconfigure the access point to the correct policy. An alarm sounds by default if the unit detects, for example, an unfamiliar wireless client or a duplicated media access control address.

Using the system, an administrator can actively manage WLAN access points. The policy can specify no access outside normal hours and prevent users from connecting to certain access points.

AirDefense maps an up-to-date graphical image of all wireless devices detected on the network and their connection types. Its optional frame-capturing ability lets it function as a packet analyzer for in-depth information about possible rogue devices.

The GCN Lab will test the prowess of AirDefense 3.5 in a future issue.

About the Authors

John Breeden II is a freelance technology writer for GCN.


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