North American Network Operators Group|
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Re: SMURF amplifier block list - READ THIS
Karl Denninger writes: >A T1 connected person launching a smurf can burn down an OC-12 if they >can find amplifiers with enough outbound capacity. Which is to say a dozen well connected DS-3 networks -- not that hard to find at all. Thankfully that number seems to be dwindling rapidly. This will eventually degenerate to attackers searching for many dozens of DS-1 networks that are open, so small providers/customers should be educated as well. >The *ONLY* long-term fix for smurfing is to prohibit directed broadcasts, I believe it has to include ingress source address validation. The overall problem remains, getting others to deny spoofing and directed broadcast responses can only be done though communication -- and sometimes excommunication is all that can be heard.