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Re: [sidr] AD Review of sidr-origin-validation-signaling-09

Chris Morrow <morrowc@ops-netman.net> Wed, 30 November 2016 15:42 UTC

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Date: Wed, 30 Nov 2016 10:42:12 -0500
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From: Chris Morrow <morrowc@ops-netman.net>
To: Randy Bush <randy@psg.com>
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Cc: Chris Morrow <morrowc@ops-netman.net>, sidr wg list <sidr@ietf.org>
Subject: Re: [sidr] AD Review of sidr-origin-validation-signaling-09
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At Wed, 30 Nov 2016 05:37:24 -0800,
Randy Bush <randy@psg.com> wrote:
> 
> >>> and stitching back together the tcp session... same effect.
> >> 
> >> Not sure why you have to stitch back together the TCP session? I
> >> thought you were supposing the "attacker" was the edge node, it can
> >> just apply an export policy towards the core.
> > 
> > say the case is inside your network, between the edge node in NYC and
> > the core nodes in BWI, something on the fiber path just removes/adds
> > information to the bgp stream.
> 
> < pedantry >
> 
> the point is the tcp 'stream' does not have to be hacked in any way.
> the hack is at a layer above.

sure. but in the case where you own both sides you'd assume that the
goes-inta == goes-outa on a single stream... ideally you also backstop
that with some protections (tcp-ao, of course!), but... really.

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