https://contact.alessandrosangiorgi.net/tags/wifi/Recent content in Wifi on Alessandro Sangiorgi — GPU Performance EngineerHugoenTue, 07 Apr 2026 00:00:00 +0000https://contact.alessandrosangiorgi.net/posts/ebpf-xdp-wifi-deauth-defense/Tue, 07 Apr 2026 00:00:00 +0000https://contact.alessandrosangiorgi.net/posts/ebpf-xdp-wifi-deauth-defense/<p>802.11 de-authentication attacks are one of the oldest and cheapest WiFi denial-of-service techniques. An attacker sends forged de-auth management frames to disconnect clients from an access point — <code>aireplay-ng</code> sends 128 per attack command (64 directed at the AP, 64 at the client). Despite being a known problem for over two decades, the main defense is still 802.11w (Protected Management Frames), which requires both AP and client support and still degrades under high-rate floods.</p>