SafeLine

SafeLine is an open-source web application firewall from Chaitin Tech that uses intelligent semantic analysis to block web attacks.

Overview

SafeLine (雷池) is a next-generation WAF built by Chaitin Tech, protecting websites against SQL injection, XSS, code execution, and other OWASP threats. Instead of pure rule matching, it applies semantic analysis and machine-learning techniques to detect attacks while minimizing false positives. The community edition is free and self-hosted, with commercial editions adding advanced protection and enterprise support. It sits in front of web servers as a reverse proxy for straightforward deployment.

SafeLine brings modern WAF technology within reach of ordinary site operators. Its semantic analysis engine understands what a request is trying to do, rather than pattern-matching payloads, which catches novel attacks while avoiding the false positives that plague older rule-based firewalls.

Deployment is straightforward: run it as a reverse proxy in front of existing web servers, typically in Docker, and manage rules through a clean console. The free community edition is genuinely capable, and commercial editions add advanced rules and support for organizations with higher assurance requirements.

Common deployments protect portals, APIs, and e-commerce sites where downtime and data leakage carry direct business cost. Traffic analytics double as an operational view of who is calling the service and how. Community documentation is thorough, and commercial support covers large-scale installations.

Key Features

• Intelligent semantic attack detection with low false-positive rates
• Protection against injection, XSS, RCE, and bot abuse
• Free community edition deployable via Docker
• Rate limiting, access control, and anti-crawler capabilities
• Real-time attack dashboards and alert notifications
• Commercial editions with advanced rules and enterprise support

Pricing

The community edition is free and open source. Commercial editions are licensed by capacity and features through Chaitin sales.

Who Is It For

Chinese site operators and security teams wanting modern WAF protection without expensive hardware or subscription costs.

Community documentation is thorough, and commercial support covers large-scale installations with higher assurance requirements and custom rules.

FAQ

Is SafeLine free to use?

Yes, the community edition is free and open source; commercial editions add advanced features and support.

Does SafeLine offer an API?

Yes, SafeLine exposes management APIs and webhooks for integrating WAF control into security operations workflows.

How does SafeLine compare to alternatives?

SafeLine offers modern semantic detection versus classic rule-based WAFs like ModSecurity, with a free tier that cloud WAF services lack. For operators who want modern WAF protection without recurring subscription costs, it is an easy recommendation.