On 26 May 2015, at 4:27, Randy Bush wrote:

may i remind you of the dns query flood i had which you helped research?
udp and tcp, from the same sources.

Yes - we determined that the TCP-based queries were a result of RRL, which is optimized to help with spoofed reflection/amplification attacks, but isn't intended to handle non-spoofed query-floods (hence S/RTBH, flowspec, IDMS, et. al.) like the particular ANY query-flood directed at your auths.

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Roland Dobbins <rdobb...@arbor.net>

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