Show HN: I deployed a Prolog WAF on a free-tier GCP instance with only 1 GB RAM

Category: security

Tags: prolog, waf, security, n-gram, llm-training, cybersecurity

Score: 4.5/10 (Innovation: 5, Technical: 6, Documentation: 4, Utility: 3)

Aethel-Core is a Web Application Firewall (WAF) implemented in SWI-Prolog that uses n-gram tokenization and recursive obfuscation decoding to detect and block Layer-7 attacks such as SQL injection and XSS. The project claims high throughput (70M LIPS) and a 100% block rate in a simulated attack, while also generating structured datasets for LLM instruction tuning. The concept of a logic-based WAF is novel, but the implementation appears incomplete (reverse proxy layer under development), the documentation is sparse and promotional, and the proprietary core limits practical utility.

Target audience: security engineers, backend developers, AI researchers interested in neuro-symbolic systems

Repository: https://prologwaf.site/ · Prolog · MIT · 8 stars

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