December 2 2017
Recently, I stumbled across a post on /r/dataisbeautiful in which the author built a heatmap from all failed SSH attempts on their personal server. There are a number of tools and strategies that can be employed to mitigate SSH based attacks, however recreating the aforementioned visualization sounded like too interesting of a project to compromise for the sake of a little safety :)
Below is a map of the origin of all SSH attempts on my Pi cluster that have been conducted in the past twenty four hours. The map is updated every two hours.