Show HN: Sinkzone DNS forwarder that blocks everything except your allowlist
17 dominis 12 8/6/2025, 4:08:23 PM github.com ↗
Most site blockers work by blacklisting distractions. That never worked for me, the internet is too big, and there’s always something new to waste time on.
I wanted the opposite: allowlist‑only browsing. Block everything by default, and explicitly allow only what I need.
So I built Sinkzone: a local DNS forwarder with two modes:
Monitor mode: lets all traffic through, but logs every domain so you can decide what to allow.
Focus mode: only allowlisted domains resolve; everything else is blocked (NXDOMAIN).
It’s open source, written in Go, and runs locally on macOS, Linux, and Windows. Works a bit like Pi‑hole, but instead of blocking ads, it blocks everything unless you say otherwise.
I’m curious if this would be useful in your workflow. If you try it, please let me know what breaks, what works well, and what you’d improve.
Improvement idea: Integrate with Apple Shortcuts, so the user could automate switching focus mode on and off, tied to changing Apple Focus mode.
Your mileage might vary, but in my home, causing my smarthome plus my wife and children’s internet to go offline might cause a bigger distraction to my focus. Also you couldn’t use a pi-hole at work for instance.
- TUI based configuration
- API endpoints