Open Source Linux

Nov 13, 2021 · Fundamentals

Mastering NAT Traversal: From Firewalls to Peer‑to‑Peer Connections

This comprehensive guide explains how two machines behind NATs and stateful firewalls can establish direct peer‑to‑peer communication by using UDP‑based techniques, STUN discovery, simultaneous transmission tricks, port‑mapping protocols, relay fallbacks like TURN and DERP, and the ICE algorithm to select the optimal path.