This content originally appeared on DEV Community and was authored by Sharon
SafeLine is a modern, open-source Web Application Firewall (WAF) you can deploy and manage entirely on your own servers — no cloud vendor lock-in, no hidden costs.
As a reverse proxy, SafeLine analyzes all HTTP/HTTPS traffic before it reaches your backend, blocking suspicious activity and malicious requests in real time.
Why Add a WAF to Your Stack?
A WAF gives your app a layer of defense against common and emerging web threats — acting as a smart filter between users and your servers.
Just as a forward proxy protects clients, a reverse proxy WAF stands guard for your application. It blocks malicious traffic, filters requests based on policies, and prevents data leaks or unauthorized access attempts.
What SafeLine Blocks
SafeLine protects your application from a wide range of web exploits, including:
- SQL Injection (SQLi)
- Cross-Site Scripting (XSS)
- Code and Command Injections
- Server-Side Request Forgery (SSRF)
- XML External Entity (XXE)
- Path Traversal
- Remote Code Execution (RCE)
- CRLF Injection
- Brute-force login attempts
- HTTP floods and abuse
- Malicious crawlers and bots
Key Features of SafeLine
Attack Prevention
Out-of-the-box protection against web threats like SQLi, XSS, SSRF, code injection, and directory traversal.
Rate Limiting
Apply smart rate limits to prevent brute-force attacks and service abuse based on IP and request frequency.
Bot Detection & Challenges
Challenge suspicious requests to filter out bots without disrupting real users.
Access Control
Add authentication gates for sensitive areas of your site — useful for staging environments or admin panels.
Dynamic Response Encryption
Make scraping harder by dynamically encrypting your site's HTML and JavaScript on every request.
Get Started with SafeLine
- Live Demo: https://demo.waf.chaitin.com:9443/statistics/dashboard
- GitHub: https://github.com/chaitin/SafeLine
- Join the Community: https://discord.gg/hUAfMWhknP
SafeLine is completely free and open-source under the GPL. Whether you're protecting a personal site or an enterprise service, it gives you full control over your web traffic security — no cloud dependency required.
This content originally appeared on DEV Community and was authored by Sharon
Sharon | Sciencx (2025-06-26T08:58:10+00:00) Host Your Own Web Firewall with SafeLine — No Cloud Needed. Retrieved from https://www.scien.cx/2025/06/26/host-your-own-web-firewall-with-safeline-no-cloud-needed/
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