Show HN: Sinkzone DNS forwarder that blocks everything except your allowlist

Summary

What is Sinkzone? Sinkzone is a local DNS resolver that helps you eliminate distractions and get deep work done. It blocks all domains by default — only the ones you explicitly allow can get through. This means notifications, social media, news, and other time-sinks are unreachable at the network level — not just in your browser. It features a modern HTTP API, wildcard pattern support, and a beautiful terminal UI for real-time monitoring and control. It's lightweight, cross-platform, and built for hackers, makers, and anyone serious about focus. Motivation Most tools make you list what you want to block. But the internet is infinite — that list never ends. It's much easier to list the few things you actually want to allow. Sinkzone was born from that insight. I was tired of coding sessions interrupted by Slack pings and email alerts. I needed something stronger than a browser plugin — a system-level kill switch for distractions. Now I can code for hours uninterrupted. Even my son uses Sinkzone during chess practice to stay focused. Sinkzone exists because I needed it. Maybe you do too. Why use Sinkzone? Avoid distraction without browser extensions or hacks Run locally on macOS, Linux and Windows — no cloud, no telemetry Perfect for deep work sessions, writing, coding, or child safety Terminal UI included — toggle modes, view logs, edit allowlist Key Features DNS-level blocking : Stops distractions before they reach your apps : Stops distractions before they reach your apps Focus Mode : Block all but allowlisted domains for a set duration : Block all but allowlisted domains for a set duration Wildcard Support : Use patterns like *github* or *.google.com for flexible domain matching : Use patterns like or for flexible domain matching HTTP API : RESTful API for monitoring and control : RESTful API for monitoring and control Terminal UI : Real-time DNS traffic viewer with tabbed interface : Real-time DNS traffic viewer with tabbed interface Memory-backed rules : Focus m...