Funny, because the first thing I thought was how frustrating it was to read. The %s are not sorted by size in the pie chart, and they're not labelled other than by colour, so you can't read the % for each country.
The attempts per hour seems to cover more than 24 hours, but the dates aren't labelled. An aggregate chart bucketed by hour of day would be more interesting, since the actual rate is quite low and has a lot of variance - at this zoom level, it's basically noise.
I agree it looks pretty, though I'd take a table with some bar chart columns.
The charts are interactive, you can hover each slice to get names and percentages, or each name to find it on the chart.
I found it wasn't really worth doing more with the chart, since its purpose was really just comparing the largest offenders.
Regarding the time frames, the buttons in the top right allow choosing the time frame. today, yesterday, 48 hours, week, month, year.
I also slapped this together in half a day.. there is plenty of room for improvement, and more charts and options could easily be added.
I didn't take this very far because this was not my goal, it was just a quick idea to allow me to block others from being able to query my server while still allowing me access from anywhere in the world. The visualizations were just for fun.
