Audio (4713), MCP (8765) and the face webhook (8766) are accepted only on usb0 from 10.55.0.1 and dropped on every other interface, Wi-Fi included. SSH is left open on all interfaces for V2, by the owner's decision. Tested on the Pi with throwaway listeners: 8765 answers over usb0 and is unreachable over Wi-Fi, while a control port answers on both. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AFN8nRRCiDiMN7ChBpHJhs