The mtproto.zig project provides a high-performance, lightweight Telegram proxy written in Zig that disguises traffic as TLS 1.3 HTTPS to effectively bypass network censorship and deep packet inspection.

Key Points

• The proxy features a 177 KB binary size, requires only 256 KB of RAM, and boots in under 10 milliseconds.
• It utilizes advanced evasion techniques, including TCPMSS fragmentation, IPv6 hopping, and application-level Split-TLS to defeat active and passive DPI probes.
• The software is built entirely on the Zig standard library with zero external dependencies, ensuring high thread safety and minimal resource overhead.
• It supports multi-user authentication and is compatible with Telegram’s MiddleProxy transport for improved media relay performance.
• Deployment is streamlined via Docker, systemd integration, and automated scripts that handle configuration and Cloudflare API-based IPv6 rotation.

Why it Matters

This tool offers a highly efficient alternative to existing C, Rust, and Go-based proxies, significantly reducing the hardware requirements needed to host censorship-resistant infrastructure. By mimicking standard browser traffic, it provides a robust solution for users in regions with strict internet filtering to maintain reliable access to Telegram.