RFC 8446, section 9.3 states:
Note that TLS's protocol requirements and security analysis only
apply to the two connections separately.  Safely deploying a TLS
terminator requires additional security considerations which are
beyond the scope of this document.

The context of that paragraph is "A middlebox which terminates a TLS 
connection" and it implies that there are undocumented security considerations.
The tls-proxy-bp draft is a contribution towards that goal and we think it is 
worth the effort.

--Roelof


> On Jul 27, 2020, at 8:35 PM, Stephen Farrell <stephen.farr...@cs.tcd.ie> 
> wrote:
> 
> 
> 
> On 28/07/2020 00:48, Eric Wang (ejwang) wrote:
>> We felt the lack of a
>> baseline bcp is going to hurt the security posture of TLS rather than
>> driving the intermediary away.
> 
> That makes no sense to me.
> 
> Adopting this draft will require eliminating all such
> gibberish and instead finding text that can garner IETF
> consensus. I really do not think that effort is worth
> the significant cost for anyone involved, pro-MITM or
> not.
> 
> S.
> 
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