In an attempt to battle the growing number of so-called rogue access points on wireless networks, AirDefense has unveiled RogueWatch 3.0.

The product offers continuous monitoring of wireless local area networks in order to detect and identify unauthorized access and activity, the company said.

Rogue access to wireless networks is a growing problem, according to various reports. AirDefense noted that wireless LAN security can be violated for as little as $150 — enough money to buy a wireless LAN access point into an Ethernet jack and linking it to a $50 wireless card on a laptop or hand-held device.

The AirDefense product includes distributed sensors and server appliances for network monitoring. If the sensors detect a violation, the information is sent to the server, which is programmed to alert network engineers.