UDP 54321
Synopsis
- Xiaomi MiIO local protocol: many Mi Home devices (e.g., Xiaomi/Roborock robot vacuums, Mi Air Purifiers, Mi Smart Plugs) listen on UDP 54321 for local discovery/handshake and control.
- Clients such as the Mi Home app, Home Assistant’s Xiaomi Miio integration, and the python-miio toolkit communicate with these devices over UDP 54321 on the LAN.
- Historically, the Back Orifice 2000 (BO2K) remote administration trojan also used UDP port 54321 (often as its default control port), and it has been associated with unauthorized remote access and intrusions.
Observed activity
Last 30 days
Detailed chart