GreyNoise is a system that collects, analyzes, and labels omnidirectional Internet scan and attack activity. But what does that even mean, and who cares? In this blog post I’ll cover what it means to “scan the Internet”, who’s doing it, and the problems it introduces. Finally I’ll cover GreyNoise, how it works, the problems it solves, and how to access the data it collects.

https://greynoise.io/blog/