Networking

QUIC tunnels, NAT traversal, and the overlay DNS resolver.

The data plane: how packets get from mlsh0 on one node to mlsh0 on another.

Why QUIC, how streams map to packets, and the TUN device lifecycle.

Candidate gathering, happy-eyeballs probing, and relay fallback.

The per-node resolver that maps <node>.<cluster> to overlay IPs.