Free, Self-Hosted Web Application Firewall Protecting Over 400,000 Installations

#websecurity #cybersecurity #waf #safeline

In the ever-evolving world of web security, protecting your website from attacks like SQL injection, XSS (Cross-Site Scripting), and automated bots is no longer optional — it’s essential.

That’s where SafeLine WAF comes in. With over 403,000 installations, SafeLine is redefining what a free, high-performance, and self-hosted WAF can achieve.

Intelligent Protection That Understands Your Traffic

Unlike traditional rule-based firewalls, SafeLine uses an intelligent semantic analysis engine to deeply parse HTTP requests.

It constructs syntax trees and evaluates contextual semantics to accurately determine whether a request carries malicious intent.

Core Capabilities

Web Attack Protection — Detects and blocks SQLi, XSS, file inclusion, and other common web attacks.
Anti-Crawler & Anti-Scanner — Stops malicious bots and automated scanners before they reach your endpoints.
Frontend Code Encryption — Dynamically encrypts JavaScript and HTML to prevent scraping and code theft.
Rate Limiting by Source IP — Controls excessive requests to prevent brute-force or CC (Challenge Collapsar) attacks.
HTTP Access Control — Restricts unauthorized or suspicious IPs from accessing sensitive endpoints.

Simple Deployment — One Command to Start

Setting up SafeLine is effortless. You can launch and manage it with a single command:

bash -c "$(curl -fsSLk https://waf-ce.chaitin.cn/release/latest/manager.sh)"

Once deployed, the system automatically generates an initial admin account.
Just log in, and your SafeLine Management Panel is ready to go.

Add Your Website and Enable Protection

To activate WAF protection, simply add your website’s domain or port under Application Management.
You can also configure port mappings to block potential intrusions through unprotected services.

Once added, SafeLine begins real-time monitoring and traffic filtering for your website.

Advanced CC & Bot Defense

SafeLine’s CC (Challenge Collapsar) and Bot Protection modules are designed to counter:

High-volume DDoS traffic
Automated brute-force attacks
Malicious crawlers and scraping bots

Through traffic behavior analysis and fingerprinting, SafeLine precisely identifies and blocks abnormal access, ensuring your site remains stable and responsive.

It also provides API endpoint analytics, letting you identify which routes receive the most hits — ideal for spotting intrusion attempts.

Built-in Authentication: Double-Layer Protection

SafeLine offers a native authentication feature that acts as a protective layer in front of your web app —
no need for additional Nginx reverse proxies.

When users access your site, they’ll first encounter a login prompt requiring valid credentials.
Unauthorized visitors are denied access instantly.

Configurable Defense Modes

Worried about false positives?
SafeLine allows flexible “log-only” or “block” modes — so you can observe attack data before enforcing strict protection.

This balance ensures high accuracy without disrupting normal traffic.

Visual Attack Detection & Logging

SafeLine provides detailed attack event tracking, including:

Attacker IP
Attack type and method
Time and frequency
Response status

Switching from monitoring to blocking mode allows SafeLine to instantly stop malicious requests and prevent repeated attacks.

Real-Time Alerts via Bots

You don’t need to monitor dashboards 24/7.
so whenever an attack is detected, you’ll get a real-time push notification.

That means your team can respond instantly — without being glued to a screen.

SafeLine WAF is proof that free doesn’t mean basic.
From semantic-level threat detection to visual analytics and bot alerts, it delivers enterprise-grade protection — all in a self-hosted, transparent package.

Whether you’re running a personal site, a business app, or managing large-scale infrastructure, SafeLine empowers you to take control of your web security.