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cyberMEDIUM2026-04-17 20:30 UTC

How We Built Our Own DNS Server

We wrote a production DNS server in ~1000 lines of Go, migrated thousands of records off Hetzner DNS, and dropped propagation time from "up to 90 minutes" to a few seconds. It uses the hidden primary pattern, Postgres as the event bus, and AXFR + IXFR to push zones to public secondaries. Here's how

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