SafeLine

SafeLine is an open-source Web Application Firewall (WAF) by Chaitin Technology designed to protect web applications and APIs by inspecting HTTP(S) traffic and blocking malicious requests. It is typically deployed in front of your apps as a reverse proxy/gateway and provides a management UI for configuring protected sites and security policies.

Key Features

• Reverse-proxy WAF deployment in front of web apps and APIs
• Protection against common web attacks (e.g., SQL injection, XSS, path traversal, command injection)
• Rule/policy-based request inspection and blocking for HTTP traffic
• Web console for configuring sites, policies, and viewing security events
• Access logs and security event visibility to aid investigation and tuning
• Containerized deployment (commonly via Docker/Docker Compose)

Use Cases

• Protect a self-hosted website or admin panel from automated scans and exploit attempts
• Add a security layer in front of internal business apps exposed to the internet
• Shield API endpoints from injection attacks and suspicious request patterns

Limitations and Considerations

• As with most WAFs, tuning policies may be required to reduce false positives for complex applications
• Advanced enterprise features (e.g., large-scale centralized management) may not be present depending on the edition

SafeLine fits teams that want a deployable, self-managed WAF to reduce exposure to common web threats. It is especially useful when placed at the edge in front of multiple services to standardize inbound traffic inspection and blocking.