Either that or it's just the normal background noise of the Internet. Let me check.
Let's try 'cat *.log
00:00 - 01:00 = 2,437,222
12:00 - 13:00 = 4,071,284
13:00 - 14:00 = 3,323,089
That's enough data. This is a blog post, not peer reviewed research.
Figure 3 million per hour * 24 hours = umm... big numbers...let me get my calculator.....Start/Run/calc.....3 * 24 = 72...
If an 'attack' is a denied packet, then seventy-two million 'attacks' per day is normal for a medium sized network ( two /16's and a /19. My guess is that some of them even come from China.
I think it's just noise.
Don't tell anyone though. NYPD is probably going after Homeland Security funding.
Oh, and one more question. How do they know 'all the attempts have failed'.