SafeLine WAF is an open-source web application firewall (WAF) built for developers who want enterprise-level protection without the complexity. Backed by security experts from top tech companies, SafeLine stops common attacks such as SQL injection and XSS — right out of the box.
In this post, you'll learn:
- What SafeLine is and why it’s different
- Why BAT security engineers recommend it
- How you can deploy it in minutes — for free
1. Introduction
SafeLine WAF, developed by Chaitin Tech over nearly a decade, was built on one mission: don’t let attackers take a single step further. It focuses on full-stack HTTP/HTTPS protection at the application layer. Instead of relying on traditional rule libraries, it uses intelligent semantic analysis to dynamically parse traffic, catching everything from SQL injections to XSS and CSRF attacks—with a false positive rate as low as 0.01%.
It also integrates multi-factor authentication (MFA) and identity and access management (IAM), supporting OAuth 2.0, CAS, and WeChat Open Platform. You can plug it right into your enterprise AD/LDAP system to manage authentication, authorization, and auditing in one place.
2. Identity Authentication in Practice
SafeLine supports OIDC (OpenID Connect), making it easy to plug in providers like Keycloak, Auth0, Okta, or Azure AD for secure login flows.
2.1 Multi-Factor, Multi-Layer Defense
- Flexible MFA: Use combos like password + dynamic token for two-factor authentication. When users access sensitive endpoints, they're required to pass both layers of verification.
- Smart Risk Detection: With user behavior analysis (UBA), SafeLine can spot unusual logins—like rapid attempts from multiple locations—and trigger extra verification or block them.
- Custom Login Pages: Want your logo? Want JavaScript obfuscation to block bots? You got it. Pages are encrypted and randomly generated each time to block automated logins.
2.2 Unified Authentication Across Platforms
- 3rd Party Friendly: GitHub, OIDC and so on—all supported. Tests show GitHub OAuth takes less than 2 seconds.
- RBAC + Audit Logs: Assign permissions by role, keep logs by action. Devs see only test env logs, ops can tweak configs.
3. Dynamic Protection: Making Static Pages a Moving Target
SafeLine WAF filters, monitors, and blocks malicious web traffic and a wide range of application-layer attacks—including DDoS, SQL injection, cookie tampering, XSS, CSRF, and file inclusion. One standout feature is its dynamic protection, now upgraded to a globally advanced level.
Unlike traditional static defenses, dynamic protection makes even static web pages behave unpredictably. SafeLine, acting as a reverse proxy, dynamically encrypts and obfuscates page code—HTML and JavaScript included—on the fly.
What does this achieve?
- Hides your front-end code
- Blocks bots and crawlers
- Stops vulnerability scanners
- Makes exploitation tools fail
Once enabled, this feature significantly boosts your site's security. Every time a user loads a protected page, the content is uniquely encrypted and randomized—making it nearly impossible for bots and scanners to make sense of it.
How to enable:
Go to SafeLine WAF → Applications → Bot Protect → Dynamic Protection → HTML or/and JS dynamic encryption →Enable → Select Resources
4. Lightweight Architecture, Enterprise-Ready
4.1 Deploy It Your Way
- Cloud Native: Docker/Kubernetes supported. One command setup (on CentOS, it installs in 5 mins).
- Hybrid-Cloud Friendly: Reverse proxy, transparent bridge, API gateways like Apache APISIX—choose your weapon.
4.2 Ops Made Simple
- One-Click Rule Sync: Push policies across clusters in seconds—100 rules in ~3s during tests.
- Attack Visualization: Real-time threat maps, top 10 attack types, and downloadable raw logs.
5. Rethinking What a WAF Can Be
SafeLine’s edge over traditional WAFs:
- Detection: Semantic analysis outperforms regex on obfuscated payloads (e.g. XSS variants).
- Price: Core functions are free in the community version. Pro version costs ~⅓ of foreign brands.
- Support: 5*8 tech team on call.
SafeLine WAF isn’t just another firewall—it’s a smarter, developer-friendly security layer built for modern web apps. With AI-powered detection and dynamic protection, it’s pushing the boundaries of what WAFs can do. As IPv6 and AI adoption grow, SafeLine is positioned to lead the next wave of global cybersecurity innovation.
Want to dive deeper?
Click the link below to join the SafeLine community chat group and connect with other tech enthusiasts.
https://discord.gg/hUAfMWhknP
Stay safe, stay open-source. 🚀