Fuso

Fuso is a lightweight intranet penetration and port-forwarding tool written in Rust. It is designed to expose internal services through a relay-style setup while remaining small, fast, and efficient. The project supports multiple connections, cascading proxy behavior, transmission encryption, and both TCP and UDP forwarding workflows. It can also work with SOCKS5 scenarios, including UDP forwarding in newer releases. Fuso is useful for developers and system administrators who need controlled access to services behind NAT, firewalls, or private networks. The project is best understood as a compact tunneling utility for learning, testing, and authorized network access rather than a commercial remote-access platform.