🧬 Related Insights?

- **Read more:** [Inside 12 AI Agent Codebases: The Inevitable God Object Trap](https://theaicatchup.com/article/every-ai-agent-ive-read-has-a-god-object-after-12-codebases-i-think-i-know-why/) - **Read more:** [The Error Budget Trap: Why Your Reliability Monitoring Is Blind to Attacks](https://theaicatchup.com/article/the-error-budget-trap-why-your-reliability-monitoring-is-blind-to-attacks/) Frequently Asked Questions **How do I install SafeLine WAF on rootless Docker?** Grab compose.yaml, set .env, switch to slirp4netns, sysctl ports, edit tengine ports/network. Full steps above—test non-prod. **What fixes SNAT in rootless Docker for SafeLine?** Slirp4netns port driver. Override docker.service.d, restart daemon. Real client IPs preserved. **Can SafeLine bind ports 80/443 rootless?** Yes, after sysctl net.ipv4.ip_unprivileged_port_start=80 and tengine port mappings. No setcap needed.

🔒 Security & Privacy

SafeLine WAF Powers Up on Rootless Docker—With Fixes

Rootless Docker just got a security boost with SafeLine WAF. But two big hurdles—ports and IPs—demand clever tweaks to make it work.

theAIcatchup Apr 09, 2026 4 min read

SafeLine WAF dashboard in rootless Docker container on secure host

⚡ Key Takeaways

Slirp4netns fixes IP preservation and low-port binds in rootless Docker. 𝕏
Edit compose.yaml: drop host network, add explicit ports and subnet IP. 𝕏
Sysctl tweak unlocks 80/443; unverified for prod—test aggressively. 𝕏

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#Docker Security #Rootless Docker #SafeLine WAF #Web Application Firewall #slirp4netns

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Originally reported by Dev.to

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