The warning "error with ICE candidate: 701 STUN host lookup received error" means there was a problem performing a STUN server lookup during the ICE (Interactive Connectivity Establishment) process. This can happen if your network blocks or restricts STUN traffic, which is used to establish direct peer-to-peer connections. However, since your test results show "Can connect via TURN" and "Pass", connectivity is not impacted. LiveKit automatically falls back to using TURN relay servers when direct connections via STUN/ICE are unavailable. This ensures users can still join and participate in rooms reliably. • Connectivity will work as expected, but traffic will be relayed through TURN servers instead of direct peer-to-peer. • This may add some latency and increase bandwidth usage, but does not prevent successful connections. The fallback mechanism is working as designed, so you can safely ignore this warning unless you specifically require direct peer-to-peer connections for optimal performance. Sources: src/connectionHelper/checks/turn.ts | Connecting to LiveKit | LiveKit Docs | Firewall Tips