Hi John!

> -----Original Message-----
> From: iesg <[email protected]> On Behalf Of John Scudder via Datatracker
> Sent: Thursday, October 28, 2021 9:42 AM
> To: The IESG <[email protected]>
> Cc: [email protected]; [email protected]; dnsop-
> [email protected]; [email protected]
> Subject: John Scudder's No Objection on draft-ietf-dnsop-dns-tcp-requirements-
> 13: (with COMMENT)
> 
> John Scudder has entered the following ballot position for
> draft-ietf-dnsop-dns-tcp-requirements-13: No Objection
> 
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> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-dnsop-dns-tcp-requirements/
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> 
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------

[snip]
 
> 3. Section 6 says applications should perform “full TCP segment reassembly”.
> What does that mean? A quick google search doesn’t suggest it’s a well-known
> term of art. I'm guessing that what you mean is that the applications should
> capture (and log, etc) the bytestream that was segmented and transmitted by
> TCP?

I'll let the authors speak to this, but I think this means full TCP stream 
reassembly -- that is analyze, the reassembled stream, not the individual 
packets.  There is a long history of evasion attacks in network security 
analysis tools when individual fragments/packets are analyzed instead of the 
reassembled streams.

Roman
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