Wifi Deauthendication Detector

Abstract

This Paper Presents A Low-cost Wi-Fi Security Monitoring System Designed To Detect Deauthentication Attacks In Real Time Using The ESP8266 NodeMCU Microcontroller. The Increasing Reliance On Wireless Networks Has Made Network Security An Urgent Priority. Deauthentication Attacks Exploit Unprotected IEEE 802.11 Management Frames To Disconnect Devices Without Authorization. The Proposed System Operates In Promiscuous Mode, Enabling It To Capture And Analyze All IEEE 802.11 Management Frames Within Radio Range. The Firmware Identifies Malicious Deauthentication (0xA0) And Disassociation (0xC0) Frame Types Commonly Exploited In Denial-of-service (DoS) Attacks. Upon Detection, The System Triggers Multi-modal Alerts Including LED Indication, Piezoelectric Buzzer Alarm, And OLED Display Notifications. Experimental Results Confirm 24x7 Monitoring Across All Wi-Fi Channels (1 Through 13) With Sub-300 Ms Detection Latency And Zero False Positives In A Realistic Office Environment Containing 14 Active Access Points.

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