Proxim AP-4000 User Manual page 112

Advanced Configuration
Alarms
Syslog Message Name
PXU Registration Successful
PXU Registration Failure
PXU Keep-alive Failure
PXU Profile Disabled
Rogue Scan
The Rogue Scan feature provides an additional security level for wireless LAN deployments. Rogue Scan uses the
selected wireless interface(s) for scanning its coverage area for Access Points and clients.
A centralized Network Manager receives MAC address information from the AP on all wireless clients detected by the AP.
The Network Manager then queries all wired switches to find out the inbound switch/port of these wireless clients. If the
switch/port does not have a valid Access Point connected to it as per a pre-configured database, the Network Manager
proceeds to block that switch/port and prevent the Rogue AP from connecting to the wired network.
Figure 4-43 Preventing Rogue AP Attacks
The figure above shows Client 1 connected to a Trusted AP and Client 2 connected to a Rogue AP. The Trusted AP
scans the networks, detects Client 2, and notifies the Network Manager. The Network Manager uses SNMP/CLI to query
the wired switch to find the inbound switch port of Client 2's packets. The Network Manager verifies that this switch/router
and port does not have a valid Access Point as per the administrator's database. Thus it labels Client 2's AP as a Rogue
AP and proceeds to prevent the Rogue AP attack by blocking this switch's port.
APs can be detected either by active scanning using 802.11 probe request frames or passively by detecting periodic
beacons, or both. Wireless clients are detected by monitoring 802.11 connection establishment messages such as
association/authentication messages or data traffic to or from the wireless clients.
There are two scanning modes available per wireless interface: continuous scanning mode and background scanning
mode.
Continuous Scanning Mode
The continuous scanning mode is a dedicated scanning mode where the wireless interface performs scanning alone and
does not perform the normal AP operation of servicing client traffic.
In continuous scanning mode the AP scans each channel for a channel scan time of one second and then moves to the
next channel in the scan channel list. With a channel scan time of one second, the scan cycle time will take less than a
minute (one second per channel). Once the entire scan channel list has been scanned the AP restarts scanning from the
beginning of the scan channel list.
Priority Severity
6 Informational
3 Major
3 Major
6 Informational
AP-4000/4000M/4900M User Guide
Description
AP successfully registers with the PXU. Message
also includes PXU IP address.
AP fails to register with the PXU. Message also
includes PXU IP address.
AP does not receive a Keep-alive response from
the PXU. Message also includes PXU IP address.
CMOB is enabled, PXU Profile is disabled
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