SafeLine is a self-hosted web application firewall that protects web applications from attacks and exploits by filtering and monitoring HTTP traffic.
SafeLine addresses the need to defend web applications against common attack vectors including SQL injection, cross-site scripting, code injection, command injection, and distributed denial-of-service attacks. It works by deploying as a reverse proxy between clients and the web application, intercepting and analyzing incoming traffic against a set of security policies. Malicious requests are blocked before reaching the application, while legitimate traffic passes through. The tool also prevents unauthorized data exfiltration from the application.
Organizations running self-hosted infrastructure who want to avoid relying on third-party WAF services should consider SafeLine. It suits teams that need direct control over their security policies and can manage the operational overhead of running their own reverse proxy. The tool is particularly valuable for protecting applications against the broad range of injection attacks and brute-force attempts that commonly target web services.
The project shows sustained development activity with regular commits addressing bug fixes and feature improvements. The maintainers actively engage with the community through multiple channels including Discord support. Documentation is maintained alongside the codebase to help users understand deployment and configuration options.
