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Tragedy of the commons situation. It is advantageous for an individual ISP to wait out for the other ISPs to block source IP spoofing.

• deathanatos 9y ago
  Note everyone seems to agree: https://www.internetsociety.org/blog/2014/07/anti-spoofing-bcp-38-and-the-tragedy-of-the-commons/ https://www.internetsociety.org/blog/2014/07/anti-spoofing-b... If I understand the article's point, essentially, carriers pay for the egress traffic that causes DDoSes, that cost and the cost of the generated ill-will outweighs that of filtering, whose price has fallen and continues to fall. Personally, I think that if the article author is correct, then I wonder if this is one of those high-level long-term decisions that companies appear absolutely incapable of making. (In my experience, short-term gains are way overvalued at the cost of long-term loss, generally, especially when it is hard to directly determine the costs/benefits involved.)