IDS - Wireless Intrusion Detection Service
Wireless Intrusion Detection Services (IDS) greatly increase the security capabilities of the SonicWall wireless security appliances. They enable recognition of, and countermeasures against, Rogue Access Points. This is the most common type of illicit wireless activity.
Access Point IDS
When the Radio Role of the wireless security appliance is set to Access Point mode, Rogue Access Point detection, by default, acts in a passive mode (passively listening to other Access Point Beacon frames only on the selected channel of operation).
A Scan momentarily changes the Radio Role to allow the wireless security appliance to perform an active scan, and might cause a brief loss of connectivity for associated wireless clients. While in Access Point mode, the Scan function should only be scheduled when no clients are actively associated, or if the possibility of client interruption is acceptable.
Rogue Access Points
Rogue Access Points have emerged as one of the most serious and insidious threats to wireless security. In general terms, an access point is considered rogue when it has not been authorized for use on a network. The convenience, affordability and availability of non-secure access points, and the ease with which they can be added to a network creates a easy environment for introducing rogue access points. The real threat emerges in a number of different ways, including unintentional and unwitting connections to the rogue device, transmission of sensitive data over non-secure channels, and unwanted access to LAN resources. While this doesn't represent a deficiency in the security of a specific wireless device, it is a weakness to the overall security of wireless networks.
The security appliance can alleviate this weakness by recognizing rogue access points potentially attempting to gain access to your network. It does this in two ways: active scanning for access points on all 2.4Ghz and 5GHz channels, and passive scanning (while in Access Point mode) for beaconing access points on a single channel of operation.
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