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3 articles tagged DNS, newest first.

How One Feature File Caused Cloudflare's Worst Outage Since 2019

How a ClickHouse permissions change doubled a Bot Management feature file and caused Cloudflare's biggest outage since 2019 on November 18, 2025.

November 19, 2025

16 min read read

Redundant DNS at Home With Pi-hole, Unbound, Keepalived and a VPN

A home DNS build with two Pi-hole and Unbound nodes, a Keepalived virtual IP and VPN routing, plus the trade-offs to weigh before copying it.

November 17, 2025

10 min read read

AWS us-east-1 Outage: Why Concentration Risk Still Matters

A DynamoDB DNS failure took down AWS US-EAST-1 and 82 services, from Slack to Ring. Why one region is still the cloud's biggest single point of failure.

October 20, 2025

9 min read read