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Thumbnail of the blog post CrowdStrike Outage 2024: Lessons Learned and Why You Need External Monitoring

CrowdStrike Outage 2024: Lessons Learned and Why You Need External Monitoring

7/9/2025

Community

620 views

GarmingoGarmingo

On July 19, 2024, a faulty configuration update from CrowdStrike triggered a blue screen of death on approximately 8.5 million Windows devices, causing the largest IT outage in history. From airline systems to banks, hospitals to broadcasters — the fallout was global  Source.

The incident lasted for days in some cases, grounding flights, crippling emergency services, and taking down critical systems.


🔍 What Happened

  • A flawed Falcon sensor update (Channel File 291) caused BSOD crashes on Windows hosts

  • Initial rollout began at 04:09 UTC

  • An estimated 8.5 million devices crashed, with ripple effects through Azure and other services  Source Source

  • Recovery was slow — manual fixes and patch rollouts took days or weeks in many environments  Source


🌍 Global Disruption

  • Delta Air Lines canceled over 7,000 flights and lost an estimated \$500 million— more days of disruption followed  Source

  • UK financial regulators reported firms must improve resilience after the event  Source

  • CrowdStrike’s market cap dropped by over a third, costing investors tens of billions, before partially recovering later in the year  Source


🧠 Why Internal Monitoring Failed

  • The crash happened on the endpoint side — internal servers and services were unaffected

  • Self-hosted tools can't watch themselves: If the entire machine crashes, there's no one to alert you

  • No multi-region or external visibility, so admins had no clue until users reported failures


✅ Why External Monitoring Matters


🛠️ Enter Garmingo Status

With Garmingo Status:

  • 🌍 Monitoring from multiple global locations

  • 🔔 Alerts via Slack, Email, Telegram, Discord, Webhooks

  • 📊 Uptime dashboards and SLA tracking

  • 🧾 PDF and compliance-ready reports

  • 📣 Public or internal status pages to keep everyone informed

  • 🆓 A one-time‑purchase Lifetime Deal (~\$50) or Free Demo

👉 Get Garmingo Status Lifetime Deal on AppSumo


💡 Final Takeaway

The CrowdStrike outage was a wake-up call — even the backbone of enterprise security can fail.

Internal tools alone can’t give you that external check when disaster strikes.

✅ External, multi-location, SLA-tracked monitoring with instant alerts and status pages is no longer optional — it’s essential.

👉 Try Garmingo Status for free or secure lifetime uptime with the AppSumo Lifetime Deal.


🧘 TL;DR

A single faulty update broke millions of systems and cost billions.

External monitoring is your safety net — don’t wait until it’s too late.

Grab Garmingo Status today — lifetime access or free trial.

Got an idea? Let us know

Alexander NeitzelAlexander Neitzel