Open‑Source Project Uses ICMP Destination Unreachable Packets for NAT Traversal

A GitHub project demonstrates NAT traversal via ICMP Destination Unreachable messages. The technique leverages standard network error packets to establish a path through NAT devices. The approach can be useful where traditional hole‑punching fails. It works without requiring changes to router configuration. The repository includes scripts to send and receive the ICMP packets. The author provides documentation and example usage. Developers can clone the repo to experiment with the method. The project aims to simplify NAT traversal for network engineers.