MeshBay Node
Inbound WebRTC/ICE for a MeshBay node. Peers connect over a DataChannel negotiated through the hub; there is no fixed listening port, because aiortc binds an ephemeral UDP port per connection. A peer that cannot reach the node directly can only be reached if the node initiates, which requires the peer to publish a routable address — browsers do not, they publish an mDNS .local name the node cannot resolve. So a node that refuses unsolicited inbound UDP is unreachable from any browser it cannot itself call back. Apply this to the zone holding the LAN interface only; it does not belong in an internet-facing zone. The node's administration surface is unaffected: it is a loopback API on 127.0.0.1 and is never exposed here.