2012/2/5 Dobbins, Roland <rdobbins@arbor.net>
On Feb 6, 2012, at 8:10 AM, Keegan Holley wrote:
An entire power point just to recommend ACL's, uRPF, CPP, DHCP snooping, and RTBH?
Actually, no, that isn't the focus of the preso.
The first four will not work against a DDOS attack
This is incorrect - suggest you read the preso.
The ACL's are configured on the routers belonging to the victim AS which will not save their access pipe if it's overrun unless I'm missing something. uRPF may help with spoofed traffic, but sometimes causes problems with multi-homing and is often more harmful than helpful depending on the network design.
and the last one just kills the patient so he does not infect other patients.
S/RTBH - as opposed to D/RTBH - doesn't kill the patient. Again, suggest you read the preso.
Source RTBH often falls victim to rapidly changing or spoofed source IP"s. It also isn't as widely supported as it should be. I never said DDOS was hopeless, there just aren't a wealth of defenses against it.