Dev Tools · 2h ago
Open-source DNS firewall appliance auto-tunes for ISPs
Sentinel DNS is an open-source DNS firewall appliance built on Rocky Linux and Unbound that deploys from a custom ISO in under 5 minutes. It automatically tunes kernel buffers, cache slabs, and memory based on hardware, and includes a 3D dashboard showing real-time threat arcs. The system supports RFC 8767 (serve-expired) and RFC 7706 (local root zone) for resilience.
Meridian48 take
While the auto-tuning and 3D dashboard are novel, the real value for ISPs is the offline deployment and built-in resilience features that reduce manual tuning.
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