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Re: Back to work

Töma Gavrichenkov <ximaera@gmail.com> Tue, 27 October 2020 07:52 UTC

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From: Töma Gavrichenkov <ximaera@gmail.com>
Date: Tue, 27 Oct 2020 10:52:22 +0300
Message-ID: <CALZ3u+a1fBq1MB52H-h-JYY=OOkOo9=jEu7smNVeyy_9U3abEw@mail.gmail.com>
Subject: Re: Back to work
To: Martin Thomson <mt@lowentropy.net>
Cc: IETF QUIC WG <quic@ietf.org>
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Peace,

On Tue, Oct 27, 2020 at 9:35 AM Martin Thomson <mt@lowentropy.net> wrote:
> 25x amplification isn't anything to celebrate, but you might
> say that the setup cost and other inherent limitations mean
> that it is rarely that bad.

This is a price an attacker only needs to pay once.  If this code
leaks to one of the myriad Mirai forks available on Github, the cost
would be effectively zero then.

> Recommending that implementations limit the number
> probes and the number of probed paths might then be
> sufficient.

_Recommendations_ never worked well for DDoS prevention in the past.
I think Section 11.3 of RFC 7252 and what happened next is the most
recent example of that.

--
Töma

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