Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet

joel jaeggli <joelja@bogus.com> Thu, 07 November 2013 19:06 UTC

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From: joel jaeggli <joelja@bogus.com>
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Date: Thu, 7 Nov 2013 11:05:58 -0800
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To: Ole Troan <otroan@employees.org>
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Cc: Fernando Gont <fgont@si6networks.com>, "v6ops@ietf.org" <v6ops@ietf.org>, Fernando Gont <fernando@gont.com.ar>
Subject: Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet
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On Nov 5, 2013, at 4:54 AM, Ole Troan <otroan@employees.org> wrote:

> Nick,
> 
>>> if you use one of these in the Internet core I cannot see any other choice than to
>>> allow forwarding of fragments. 
>> 
>> no, drop!  Because otherwise your infrastructure is wide open to control
>> plane attacks with ipv6 frags, with no means of defence!  If that happens,
>> then your entire network falls over.
> 
> why don't you filter out packets on the edge destined to your router's addresses?
> instead of what's effectively breaking IPv6 service across the network.

my routers actually do process unsolicited packets from from the internet (icmp echo for example, packets of any variety with a ttl of 1) and do need the control plane acl that reflects that.


> 
> cheers,
> Ole
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