On Thu, Apr 23, 2020 at 3:26 PM Ca By <cb.list6@gmail.com> wrote:
On Thu, Apr 23, 2020 at 3:14 PM Compton, Rich A <Rich.Compton@charter.com> wrote:

Good luck with that.  😊  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. https://stats.cybergreen.net

I think we need to instead collectively focus on stopping the spoofed traffic that allows these attacks to be generated in the first place.

-Rich


The bcp38 religion has failed to deliver the promised land for 20 years. 

That's because it's been opt-in for thousands of ASNs.

1 spoofer is all you need to trigger all the reflectors. 

A handful of transit providers is all you need to identify and filter all sources of spoofing.

I do bcp38, i encourage others to as well, but i do not plan on it unclogging the pipes in my lifetime. 

You will get more miles from ACL dropping and policing known bad traffic (most of udp)

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).

Damian

From: NANOG Email List <nanog-bounces@nanog.org> on behalf of Bottiger <bottiger10@gmail.com>
Date: Thursday, April 23, 2020 at 3:32 PM
To: Siyuan Miao <aveline@misaka.io>

Cc: NANOG list <nanog@nanog.org>
Subject: Re: Best way to get foreign ISPs to shut down DDoS reflectors?

 

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.

 

On Thu, Apr 23, 2020 at 2:23 PM Siyuan Miao <aveline@misaka.io> wrote:

It won't work.

 

Get a good DDoS protection and forget about it.

 

On Fri, Apr 24, 2020 at 5:17 AM Bottiger <bottiger10@gmail.com> wrote:

Is there a guide on how to get foreign ISPs to shut down reflectors used in DDoS attacks?

 

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.

 

Example Networks:

 

CLARO S.A.

Telefonica

China Telecom

Korea Telecom

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