Looking for a free and effective Web Application Firewall (WAF) to protect your websites from attacks? Let me introduce you to SafeLine — a self-hosted, open-source WAF built by security experts at Chaitin Tech, designed specifically for the developer and security community.
What Is a WAF and Why Does It Matter?
A Web Application Firewall (WAF) is a security layer that protects web applications from malicious traffic. It typically sits in front of the application as a reverse proxy, monitoring and filtering HTTP/HTTPS requests in real time.
WAFs can block common attacks like:
- SQL Injection (SQLi)
- Cross-Site Scripting (XSS)
- Cross-Site Request Forgery (CSRF)
- Remote Code Execution (RCE)
- Business logic abuse
- Zero-day vulnerabilities
- App-specific exploits (e.g., WordPress, Joomla, Drupal)
Why Choose SafeLine?
There are many WAF products out there — commercial, cloud-based, open-source, or appliance-based. So what makes SafeLine worth a look?
Here are five reasons:
1. Powerful Protection Out of the Box
SafeLine offers comprehensive defense against:
- OWASP Top 10 vulnerabilities
- CVE Top 1000 exploits
- Targeted attacks on CMS platforms like WordPress, Joomla, Drupal
- Advanced evasion techniques like obfuscation and encoding
Its detection engine is based on semantic-aware algorithms, enabling it to catch even highly obfuscated payloads.
2. Advanced Detection Technologies
SafeLine goes beyond signature matching. It uses:
- Semantic analysis to understand the intent behind requests
- Adaptive learning to suit different web environments
- Custom rules that let you tailor behavior for your needs
This helps reduce both false positives and false negatives — something every security engineer can appreciate.
3. High-Quality Project Standards
SafeLine is a full-featured WAF with:
- Web-based management console
- Real-time logs and analytics
- Configurable rulesets
- Clean, well-documented source code
It’s designed to be developer-friendly — easy to deploy, easy to understand, and easy to extend.
4. Trusted by the Community
SafeLine has earned recognition from developers, companies, and security professionals alike. It has been used in sectors ranging from startups to government and education.
It has also received industry recognition from platforms like Gartner and FreeBuf’s Top 100.
5. Active, Open Community
As a community-driven project, SafeLine is regularly updated and actively maintained. You’ll find:
- A detailed official website
- A transparent GitHub repository
- Frequent releases
- Responsive issue discussions
Get Started
You can download and install SafeLine from the official site.
You’ll also find documentation, resources, and community links to help you get started.
Live Demo: https://demo.waf.chaitin.com:9443/statistics/dashboard
GitHub Repo: https://github.com/chaitin/SafeLine
Discord Group: https://discord.gg/hUAfMWhknP
Whether you're running a personal blog or managing an enterprise app, SafeLine gives you the tools to defend your web stack — for free.