Linksys WUSB200 User Manual page 61

Wireless-G Business USB Network Adapter with RangeBooster
The following table is a summary of the various alert descriptions and advice.
Item Alert
1 Rogue Client Detected
Chapter 6: The Administrative Functions in the Wireless Network Monitor
Security Monitor
Table 1: Alerts
Description
A Rogue Client is detected.
For details, press the Advice button.
Description:
Rogue Client is detected doing one or more illegal actions, e.g., causing Message
Integrity Check (MIC) errors, sending disassociation frames, sending
deauthentication frames, and sending association frames with incorrect
encryption.
MIC error generation: The MIC function prevents attacks on encrypted packets.
During an attack, an intruder intercepts an encrypted (WPA - Personal) message,
alters it slightly, and retransmits it, and the receiver accepts the retransmitted
message as legitimate. This action will cause a MIC error. If an attacker causes
two MIC errors within 60 seconds, it will be considered a Rogue Client.
Disassociation attacking:
Occurs when a wireless station transmits a disassociation request to an AP which
it is not associated with.
De-authentication attacking:
Occurs when a wireless station transmits a de-authentication request to an AP
which it is not associated with.
Authentication failure:
Occurs when the AP receives an association request with different encryption from
a wireless client.
Action:
1. Contact the network administrator and send the administrator the Rogue Client
computer information.
2. Change MAC access control list on the AP and further block the Rogue Client's
activities.
Advice
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