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Ever worry about web attacks like SQL injection, XSS, or bot scrapers draining your server resources?
is a next-gen open-source Web Application Firewall (WAF) that’s been taking the dev and security community by storm — with 28K+ active installs and 14.4K+ GitHub stars, it's quickly become the go-to open-source WAF solution in the whole world.
Whether you're defending APIs, business-critical systems, or microservices in the cloud, SafeLine delivers enterprise-grade protection in a clean, containerized, developer-friendly package.
? System Requirements
Before installation, make sure your environment is ready:
SafeLine offers 3 install modes:
bash -c "$(curl -fsSLk )"
? Full docs:
? What Makes SafeLine Different?
SafeLine isn't just "another WAF" — it's built from the ground up with:
Semantic Analysis Detection Engine
Forget basic pattern matching. SafeLine’s core engine understands the intent behind requests, making it capable of detecting 0-days and advanced evasive payloads.
API Protection
Integrates with API gateways like APISIX, giving you fine-grained control over REST endpoints, including:
Intelligent Semantic Analysis
SafeLine offers robust protection for business-critical systems. It defends against common web attacks like SQL injection, XSS, and malicious file uploads. Powered by an intelligent semantic analysis engine, it accurately detects and blocks such threats, safeguarding core systems from harm.
Container-Native Architecture
SafeLine is built using microservices and supports full containerized deployment out of the box. It's ideal for:
No special hardware or proprietary licenses needed.
Real-World Usage Highlights
Let’s take a look at how SafeLine performs in real scenarios.
? Bot Protection
A large portion of internet traffic comes from automated programs like crawlers, scanners, worms, and exploit tools—not real users. Identifying real human users is critical for improving security and defending against these automated threats.
By enabling specific detection modules, SafeLine examines various client-side factors before allowing access to the site:
Based on these traits, SafeLine scores and categorizes requests. Genuine users are allowed through, while bots are blocked—keeping your site fast and secure.
?️ HTTP Flood Protection
HTTP flood attacks are a type of Layer 7 DDoS attack. They overwhelm servers by sending a high volume of seemingly legitimate HTTP requests, consuming CPU and memory resources and making websites inaccessible to real users.
SafeLine mitigates these attacks by enforcing rate limits per IP address. If an IP exceeds a defined threshold, SafeLine automatically blocks further requests from that source.
It also detects abnormal traffic patterns through behavior analysis, adding an extra layer of protection against automated and malicious request floods.
? Learn More
Final Thoughts
If you're a developer, security engineer, or DevOps professional looking for a powerful, fast, and free WAF that goes beyond signature-based defense, SafeLine is absolutely worth a try.
Give it a
on GitHub and start protecting your web apps like a pro.
is a next-gen open-source Web Application Firewall (WAF) that’s been taking the dev and security community by storm — with 28K+ active installs and 14.4K+ GitHub stars, it's quickly become the go-to open-source WAF solution in the whole world.
Whether you're defending APIs, business-critical systems, or microservices in the cloud, SafeLine delivers enterprise-grade protection in a clean, containerized, developer-friendly package.
? System Requirements
Before installation, make sure your environment is ready:
- OS: Linux
- CPU: x86_64 (with ssse3) or ARM64
- Docker: v20.10.14+
- Docker Compose: v2.0.0+
- Resources: 1 CPU / 1 GB RAM / 5 GB Disk
SafeLine offers 3 install modes:
- One-liner install (best for beginners):
bash -c "$(curl -fsSLk )"
Manual install (for Linux/Docker-savvy users)
Offline install (if your system doesn’t have internet access)
? Full docs:
? What Makes SafeLine Different?
SafeLine isn't just "another WAF" — it's built from the ground up with:
Semantic Analysis Detection EngineForget basic pattern matching. SafeLine’s core engine understands the intent behind requests, making it capable of detecting 0-days and advanced evasive payloads.
API ProtectionIntegrates with API gateways like APISIX, giving you fine-grained control over REST endpoints, including:
- IP-based access control
- Rate limiting per endpoint
- Deep inspection of API payloads
Intelligent Semantic AnalysisSafeLine offers robust protection for business-critical systems. It defends against common web attacks like SQL injection, XSS, and malicious file uploads. Powered by an intelligent semantic analysis engine, it accurately detects and blocks such threats, safeguarding core systems from harm.
Container-Native ArchitectureSafeLine is built using microservices and supports full containerized deployment out of the box. It's ideal for:
- Cloud-native infrastructure
- Kubernetes environments
- On-demand resource scaling
No special hardware or proprietary licenses needed.
Real-World Usage HighlightsLet’s take a look at how SafeLine performs in real scenarios.
? Bot Protection
A large portion of internet traffic comes from automated programs like crawlers, scanners, worms, and exploit tools—not real users. Identifying real human users is critical for improving security and defending against these automated threats.
By enabling specific detection modules, SafeLine examines various client-side factors before allowing access to the site:
- User agent behavior
- JavaScript support
- Cookie handling
- Client interaction patterns
Based on these traits, SafeLine scores and categorizes requests. Genuine users are allowed through, while bots are blocked—keeping your site fast and secure.
?️ HTTP Flood Protection
HTTP flood attacks are a type of Layer 7 DDoS attack. They overwhelm servers by sending a high volume of seemingly legitimate HTTP requests, consuming CPU and memory resources and making websites inaccessible to real users.
SafeLine mitigates these attacks by enforcing rate limits per IP address. If an IP exceeds a defined threshold, SafeLine automatically blocks further requests from that source.
It also detects abnormal traffic patterns through behavior analysis, adding an extra layer of protection against automated and malicious request floods.
? Learn More
- ? GitHub:
- ? Docs:
- ? Discord Group:
Final ThoughtsIf you're a developer, security engineer, or DevOps professional looking for a powerful, fast, and free WAF that goes beyond signature-based defense, SafeLine is absolutely worth a try.
Give it a
on GitHub and start protecting your web apps like a pro.