Sinkzone DNS – Forwarder that blocks everything except your allowlist
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…
In plain words
Sinkzone DNS is a local DNS forwarder that uses allowlist-only browsing to reduce distractions. It offers two modes: Monitor mode logs all domain traffic for review, and Focus mode blocks everything except explicitly allowed domains. Built in Go and open source, it runs on macOS, Linux, and Windows. Unlike traditional site blockers that blacklist distractions, Sinkzone takes the opposite approach by blocking all traffic by default, requiring users to actively permit only necessary sites.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
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.
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