[NicoJuicy]

They normally use "machine learning". In the past, they used catboost

https://blog.cloudflare.com/how-cloudflare-runs-ml-inference...

[jgrahamc]

We use a lot of stuff. Here's another example: "To identify DGA domains, we trained a model that extends a pre-trained transformers-based neural network."

https://blog.cloudflare.com/threat-detection-machine-learnin...

[ianpurton]

Are some of these models/techniques open source?

It would be nice to integrate them into on prem solutions.

[jgrahamc]

No. We open source a lot of stuff (most recently Pingora: https://blog.cloudflare.com/pingora-open-source) but the models used for protection services are not open.