Re: recursive DNS servers DDoS as a growing DDoS problem
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Stephen Samuel wrote:
| To put it another way: UDP as a purely connectionless
| protocol is fast becoming a liability in situations where
| significant amplification is possible.
My thoughts exactly. This attack is possible because of a design limitation of
UDP (and other connectionless protocols). I realise that DNS is receiving
attention because of it's ubiquity on the Internet, but this type of attack can
leverage any service that responds with a reply packet larger than the initial
query packet where the protocol used is connectionless. TCP/IP is showing it's
age (again).
Thanks,
Paul
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