Show HN: Sibuna OSS simple web application firewall with proof of work

Category: security

Tags: web-security, proof-of-work, rust, waf, reverse-proxy

Score: 6.8/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 6)

Sibuna is a Rust-based web application firewall that uses browser proof-of-work (sequential work or Hashcash) to deter bot traffic, along with policy rules, rate limiting, TLS fingerprinting, and an operator console. It stands out for its single-binary deployment, cross-platform support, and embedded SQLite/PostgreSQL cluster mode, making it a lightweight but capable WAF alternative.

Target audience: backend developers, devops engineers, security engineers

Repository: https://github.com/insanai/sibuna · Rust · NOASSERTION · 9 stars

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