Re: [tcpinc] Benoit Claise's No Objection on draft-ietf-tcpinc-tcpcrypt-09: (with COMMENT)
Benoit Claise <bclaise@cisco.com> Fri, 17 November 2017 07:37 UTC
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To: Daniel B Giffin <dbg@scs.stanford.edu>
Cc: The IESG <iesg@ietf.org>, draft-ietf-tcpinc-tcpcrypt@ietf.org, Kyle Rose <krose@krose.org>, tcpinc-chairs@ietf.org, tcpinc@ietf.org, wangzitao@huawei.com
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From: Benoit Claise <bclaise@cisco.com>
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Date: Fri, 17 Nov 2017 15:37:33 +0800
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Subject: Re: [tcpinc] Benoit Claise's No Objection on draft-ietf-tcpinc-tcpcrypt-09: (with COMMENT)
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Thanks. Regards, Benoit > Benoit Claise wrote: >> ---------------------------------------------------------------------- >> COMMENT: >> ---------------------------------------------------------------------- >> >> Nothing against the publication of this document but ... as for any >> experimental RFCs, we must describe the criteria for a successful experiment >> (evaluation)? > Oh right! > > I've added this section: > > 9. Experiments > > Some experience will be required to determine whether the tcpcrypt > protocol can be deployed safely and successfully across the diverse > environments of the global internet. > > Safety means that TCP implementations that support tcpcrypt are able > to communicate reliably in all the same settings as they would > without tcpcrypt. As described in [I-D.ietf-tcpinc-tcpeno] > Section 9, this property can be subverted if middleboxes strip ENO > options from non-SYN segments after allowing them in SYN segments; or > if the particular communication patterns of tcpcrypt offend the > policies of middleboxes doing deep-packet-inspection. > > Success, in addition to safety, means that hosts which implement > tcpcrypt actually enable encryption when they connect to each other. > This property depends on the network's treatment of the TCP-ENO > handshake, and can be subverted if middleboxes merely strip unknown > TCP options or if they terminate TCP connections and relay data back > and forth unencrypted. > > Ease of implementation will be a further challenge to deployment. > Because tcpcrypt requires encryption operations on frames that may > span TCP segments, kernel implementations are forced to buffer > segments in different ways than are necessary for plain TCP. More > implementation experience will show how much additional code > complexity is required in various operating systems, and what kind of > performance effects can be expected. > > . >
- [tcpinc] Benoit Claise's No Objection on draft-ie… Benoit Claise
- Re: [tcpinc] Benoit Claise's No Objection on draf… Daniel B Giffin
- Re: [tcpinc] Benoit Claise's No Objection on draf… Benoit Claise