<div dir="ltr"><div dir="ltr">On Thu, Apr 23, 2020 at 3:26 PM Ca By <<a href="mailto:cb.list6@gmail.com">cb.list6@gmail.com</a>> wrote:</div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 23, 2020 at 3:14 PM Compton, Rich A <<a href="mailto:Rich.Compton@charter.com" target="_blank">Rich.Compton@charter.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:12pt">Good luck with that. </span>
<span style="font-size:12pt;font-family:"Apple Color Emoji"">😊</span><span style="font-size:12pt"> As Damian Menscher has presented at NANOG, even if we do an amazing job and shut down 99% of all DDoS reflectors, there will still be enough bandwidth to
generate terabit size attacks. <a href="https://stats.cybergreen.net" target="_blank">https://stats.cybergreen.net</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12pt">I think we need to instead collectively focus on stopping the spoofed traffic that allows these attacks to be generated in the first place.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12pt">-Rich</span></p></div></div></blockquote><div dir="auto"><br></div><div dir="auto">The bcp38 religion has failed to deliver the promised land for 20 years. </div></div></div></blockquote><div><br></div><div>That's because it's been opt-in for thousands of ASNs.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail_quote"><div dir="auto">1 spoofer is all you need to trigger all the reflectors. </div></div></div></blockquote><div><br></div><div>A handful of transit providers is all you need to identify and filter all sources of spoofing.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail_quote"><div dir="auto">I do bcp38, i encourage others to as well, but i do not plan on it unclogging the pipes in my lifetime. </div><div dir="auto"><br></div><div dir="auto">You will get more miles from ACL dropping and policing known bad traffic (most of udp)</div></div></div></blockquote><div><br></div><div>Do you have 10 Tbps of spare ingress capacity? If not, you should re-think your strategy (which may simply include a playbook for how to explain the outage to your customers).</div><div><br></div><div>Damian</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US">
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<p class="MsoNormal"><b><span style="font-size:12pt;color:black">From: </span></b><span style="font-size:12pt;color:black">NANOG Email List <<a href="mailto:nanog-bounces@nanog.org" target="_blank">nanog-bounces@nanog.org</a>> on behalf of Bottiger <<a href="mailto:bottiger10@gmail.com" target="_blank">bottiger10@gmail.com</a>><br>
<b>Date: </b>Thursday, April 23, 2020 at 3:32 PM<br>
<b>To: </b>Siyuan Miao <<a href="mailto:aveline@misaka.io" target="_blank">aveline@misaka.io</a>><br>
</span></p></div></div><div lang="EN-US"><div><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(181,196,223);padding:3pt 0in 0in"><p class="MsoNormal"><span style="font-size:12pt;color:black"><b>Cc: </b>NANOG list <<a href="mailto:nanog@nanog.org" target="_blank">nanog@nanog.org</a>><br>
<b>Subject: </b>Re: Best way to get foreign ISPs to shut down DDoS reflectors?<u></u><u></u></span></p></div></div></div><div lang="EN-US"><div><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(181,196,223);padding:3pt 0in 0in"><p class="MsoNormal"><span style="font-size:12pt;color:black"></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">We are unable to upgrade our bandwidth in those areas. There are no providers within our budget there at the moment. Surely there must be some way to get them to respond.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Thu, Apr 23, 2020 at 2:23 PM Siyuan Miao <<a href="mailto:aveline@misaka.io" target="_blank">aveline@misaka.io</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">It won't work. <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Get a good DDoS protection and forget about it.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Fri, Apr 24, 2020 at 5:17 AM Bottiger <<a href="mailto:bottiger10@gmail.com" target="_blank">bottiger10@gmail.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Is there a guide on how to get foreign ISPs to shut down reflectors used in DDoS attacks?
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I've tried sending emails listed under abuse contacts for their regional registries. Either there is none listed, the email is full, email does not exist, or they do not reply. Same results when sending to whatever other email they have
listed.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Example Networks:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">CLARO S.A.<u></u><u></u></p>
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<p class="MsoNormal">Telefonica<u></u><u></u></p>
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<p class="MsoNormal">China Telecom<u></u><u></u></p>
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<p class="MsoNormal">Korea Telecom<u></u><u></u></p>
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