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Monitoring & security, explained

Practical, no-fluff guides on uptime and security monitoring — fixing security headers, email authentication, SSL certificates, and consolidating your monitoring stack.
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All posts security 23 uptime 21 monitoring 19 incidents 18 outages 10 tls 9 https 9 dns 8 ssl 8 performance 8 email-security 6 security-headers 5
outages retrospective

2024 — The Year in Outages, and What It Taught Us

CrowdStrike, polyfill.io and a year of cloud wobbles — what 2024's defining outages have in common and what small teams should carry into 2025.
· 6 min read
outages incidents

The CrowdStrike Outage — Lessons From the Biggest IT Failure Ever

A bad CrowdStrike channel file blue-screened ~8.5 million Windows machines on July 19. What the biggest IT outage ever teaches teams of every size.
· 6 min read
outages incidents

The Atlassian Outage — Two Weeks of Downtime and a Masterclass in What Not to Say

A maintenance script permanently deleted ~400 Atlassian customers' cloud sites; restoration took two weeks. Lessons on incident communication and backups.
· 6 min read
outages dns

The Facebook Outage — What BGP and DNS Taught Everyone This Week

Facebook, Instagram and WhatsApp vanished for six hours this week after a BGP misstep took out their DNS. What the outage teaches every team about resilience.
· 6 min read
outages cdn

The Fastly Outage — What Tuesday's Hour of Broken Internet Teaches About Third-Party Risk

Fastly's June 8 outage took down Amazon, Reddit and gov.uk for nearly an hour. What one config change teaches about CDN blast radius and third-party risk.
· 6 min read
cloudflare outages

One Bad Regex — Lessons From the July 2 Cloudflare Outage

A WAF rule with catastrophic backtracking pushed every Cloudflare edge CPU to 100% and served 502s worldwide. What the outage teaches every team.
· 6 min read
bgp outages

Yesterday's BGP Route Leak — How a Small ISP Rerouted the Internet

A Pennsylvania ISP's route optimizer leaked routes, Verizon propagated them, and traffic for Cloudflare and Amazon went sideways. What BGP teaches us.
· 6 min read
ddos security

1.35 Terabits Per Second — What the GitHub DDoS Teaches Everyone Else

How a 1.35 Tbps memcached amplification attack knocked GitHub offline for ten minutes — and what the record DDoS teaches every team about preparation.
· 6 min read
aws outages

The S3 Outage — Why Your Status Page Can't Live on Your Own Infrastructure

Amazon's four-hour S3 outage broke half the web — and AWS's own dashboard couldn't turn red. Why status pages must live on independent infrastructure.
· 6 min read
dns ddos

The Dyn Attack — DNS Is the Single Point of Failure Everyone Forgets

Last Friday a botnet of cameras and DVRs took down Dyn's DNS — and Twitter, Reddit and Spotify with it. Lessons on DNS redundancy, TTLs and monitoring.
· 6 min read

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