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Sometimes a large number of servers get hacked by the same security fault. Hackers use these resources in order to launch an attack into a target. As our network is an important one, often the target is destroyed.
These attacks are made in 98 cases out of 100 on the UDP layer.
We have currently an attack on which we will examine setting a restriction in order to block it.
We are trying to aggregate the attack to 20Mbps into the IP target.
Update(s):
Date: 2012-03-13 04:05:02 UTC Well, it works, it remains to check how and when to generalize it on the UDP layer and by how much by IP.
Date: 2012-03-06 06:09:30 UTC We limited it to 10Mbps, 5Mbps and 1Mbps to check if the restrictions are working. And it works. So we have the techno. And Facebook is happy :)
To check if it works we released traffic to FB by our USA backbone and our backbone San Jose in California-. Then we watched the behavior when we changed the settings.