Have you experienced that "Huh? The page won't load..." feeling while using the internet lately? Actually, on November 18, 2025, a major outage occurred at the large service "Cloudflare," and it caused quite a significant impact💭
This time, I'll briefly introduce how Cloudflare responded and what the cause was✨
What is Cloudflare Anyway?
First, Cloudflare is like a "guardian deity of the web."
For example, it's a company that speeds up website displays and protects them from attacks, and it's used by various websites all over the world.
So when Cloudflare isn't working properly, all the sites using it get affected😳
What Happened?
The outage on November 18 was caused by a problem with Cloudflare's DNS service.
DNS is like the internet's address book, responsible for converting site names into IP addresses.
When this DNS had trouble, websites and online services became difficult to connect to, and some became completely inaccessible.
What Was the Impact?
- Major news sites and shopping sites temporarily became unavailable🥺
- Connections for some games and apps became unstable
- Many company websites also became inaccessible, causing trouble👀
Roughly like this, and I also saw lots of voices on social media saying "Why won't it connect!"💬
How Did Cloudflare Respond?
Cloudflare immediately began investigating the cause and identified and fixed a DNS configuration issue.
After that, services gradually recovered✨
Their official blog explained that "this issue was triggered by a system update mistake."
In other words, it seems something unexpected happened during the update process.
Summary: Internet Infrastructure is Tough!
When such large-scale outages occur, you really feel the complexity of the internet infrastructure we normally use without thinking🌸
This time, thanks to Cloudflare's quick response, it didn't turn into major damage, but it made me realize again how grateful we should be that the internet usually works properly🥺
If something happens again, it might be best to stay calm and check official information💡
Social media information can sometimes be excessive too!
This was a story that made me think how important the invisible backend of the internet really is❣️
Hatena
Comments
ハンナ
Surprisingly, it wasn't DNS.
ノーラン
Using unwrap() in production is way too dangerous. /r/rust is probably going crazy.
サム
Cloudflare and AWS having major outages within a month is seriously bad.
ベン
I got fooled by https://isitdns.com/!
ハンナ
Why was even the status page down? They said it wasn't related.
クリス
If a Rust panic showed up in the logs, you'd think they'd figure out the cause in under 2 hours.
ロバート
Trouble happens, but 3-6 hours for recovery is way too long.
キンバリー
The technical details are interesting! I'm gonna use this in my DB class tomorrow.
ハンナ
I thought it was DNS but it wasn't! But a fixed file size bug is kinda dumb. Couldn't they catch that in testing?
ノーラン
It's funny how they migrated to a language where you add lifetime annotations to everything for memory safety, only to crash from an unwrap. It's like riding in an armored car with all the windows open.
レオ
So it wasn't Google's fault after all (lol)
エイダン
Kevin Fang should make a Cloudflare outage summary video already, he's caught the last two.
クリス
Rust enthusiasts: 'Result types are safer and more convenient than exceptions' → Newbies just use .unwrap() easily.
ベン
It wasn't DNS? What is this!
