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Re: [DNSOP] FYI: draft-andrews-dnsop-defeat-frag-attack

Mukund Sivaraman <muks@mukund.org> Wed, 10 July 2019 07:51 UTC

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Date: Wed, 10 Jul 2019 15:50:28 +0800
From: Mukund Sivaraman <muks@mukund.org>
To: Mark Andrews <marka@isc.org>
Cc: IETF DNSOP WG <dnsop@ietf.org>
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Subject: Re: [DNSOP] FYI: draft-andrews-dnsop-defeat-frag-attack
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On Wed, Jul 10, 2019 at 04:21:11PM +1000, Mark Andrews wrote:
> I’ve written up a method to defeat UDP fragmentation attacks using TSIG.
> 
> https://tools.ietf.org/html/draft-andrews-dnsop-defeat-frag-attack-00
> 
> If we are going to discuss methods to defeat such attacks this should be
> considered.

+1

As an alternative, I also point to the following draft from 2015:
https://tools.ietf.org/html/draft-muks-dns-message-checksums-00

A BIND implementation of it is here:
https://github.com/muks/bind9/tree/dns-message-checksums

		Mukund

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