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How Cloudflare blocked a monumental 7.3 Tbps DDoS attack

(blog.cloudflare.com)
265 points methuselah_in | 1 comments | 20 Jun 25 18:34 UTC | HN request time: 0.201s | source
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jakub_g ◴[24 Jun 25 14:48 UTC] No.44366870[source]▶
> QOTD DDoS attack

> How it works: Abuses the Quote of the Day (QOTD) Protocol, which listens on UDP port 17 and responds with a short quote or message.

Does any reasonable operating system those days support this protocol? Sounds like "IP over Avian Carriers" to me.

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1. toast0 ◴[24 Jun 25 14:58 UTC] No.44366980[source]▶
Is it part of Microsoft Services for Unix? That seemed to be the primary source of chargen reflectors when I was getting hit by that; and it feels like a similar thing.