this post was submitted on 19 Nov 2025
358 points (98.4% liked)

Technology

76918 readers
3409 users here now

This is a most excellent place for technology news and articles.


Our Rules


  1. Follow the lemmy.world rules.
  2. Only tech related news or articles.
  3. Be excellent to each other!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
  9. Check for duplicates before posting, duplicates may be removed
  10. Accounts 7 days and younger will have their posts automatically removed.

Approved Bots


founded 2 years ago
MODERATORS
 

The issue was not caused, directly or indirectly, by a cyber attack or malicious activity of any kind. Instead, it was triggered by a change to one of our database systems' permissions which caused the database to output multiple entries into a “feature file” used by our Bot Management system. That feature file, in turn, doubled in size. The larger-than-expected feature file was then propagated to all the machines that make up our network.

The software running on these machines to route traffic across our network reads this feature file to keep our Bot Management system up to date with ever changing threats. The software had a limit on the size of the feature file that was below its doubled size. That caused the software to fail.

you are viewing a single comment's thread
view the rest of the comments
[–] floquant@lemmy.dbzer0.com 34 points 1 day ago (2 children)

Their motivation is that that file has to change rapidly to respond to threats. If a new botnet pops up and starts generating a lot of malicious traffic, they can't just let it run for a week

[–] unexposedhazard@discuss.tchncs.de 4 points 1 day ago* (last edited 1 day ago) (1 children)

How about an hour? 10 minutes? Would have prevented this. I very much doubt that their service is so unstable and flimsy that they need to respond to stuff on such short notice. It would be worthless to their customers if that were true.

Restarting and running some automated tests on a server should not take more than 5 minutes.

[–] SMillerNL@lemmy.world 11 points 1 day ago (2 children)

5 minutes of uninterrupted DDoS traffic from a bot farm would be pretty bad.

[–] ramble81@lemmy.zip 11 points 1 day ago* (last edited 1 day ago) (1 children)

5 hours of unintended downtime from an update is even worse.

Edited for those who didn’t get the original point.

[–] SMillerNL@lemmy.world 5 points 1 day ago (1 children)

It wasn’t an unintentional update though, it was an intentional update with a bug.

[–] ramble81@lemmy.zip 1 points 1 day ago

Edited. My point still stands.

[–] dafta@lemmy.blahaj.zone 7 points 1 day ago (1 children)

Significantly better than several hours od most of the internet being down.

[–] SMillerNL@lemmy.world 5 points 1 day ago

Maybe not updating bot mitigation fast enough would cause an even bigger outage. We don’t know from the outside.

[–] echodot@feddit.uk -3 points 1 day ago (1 children)

There are technical solutions to this. You update half your servers, and then if they die you just disconnect them from the network while you fix them and then have your own unaffected servers take up the load. Now yes, this doesn't get a fixout quickly, but if you update kills your entire system, you're not going to get the fix out quickly anyway.

[–] floquant@lemmy.dbzer0.com 4 points 23 hours ago* (last edited 23 hours ago)

Congratulations, now your "good" servers are dead from the extra load and you also have a queue of shit to go through once you're back up, making the problem worse. Running a terabit-scale proxy network isn't exactly easy, the amount of moving parts interacting with each other is insane. I highly suggest reading some of their postmortems, they're usually really well written and very informative if you want to learn more about the failures they've encountered, the processes to handle them, and their immediate remediations