On Wed, 8 Mar 2006, Security Lists wrote:
Sorry, I don't see this as amplification in your example, because YOUR dns servers are 100% of the traffic. 1:1 ratio.
Once the first request to the nameservers is made, the object should be cached by the nameservers. Instead of one packet to each server, consider a stream of packets to each server. The recipient will recieve a stream of 100K answers with likely only 200K of traffic back to the attackers DNS server.
Or better, find some random authoritative nameserver with a big DNS record, and then a very small portion of the attackers traffic is used and it is less likely to be tied back to the attacker since they don't own the record being requested.
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