Re: [TLS] Last Call: <draft-ietf-tls-ssl2-must-not-03.txt> (Prohibiting SSL Version 2.0) to Proposed Standard

"Glen Zorn" <gwz@net-zen.net> Thu, 02 December 2010 02:30 UTC

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Date: Thu, 2 Dec 2010 09:31:14 +0700
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Subject: Re: [TLS] Last Call: <draft-ietf-tls-ssl2-must-not-03.txt> (Prohibiting SSL Version 2.0) to Proposed Standard
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Section 3 says "TLS clients MUST NOT send SSL 2.0 CLIENT-HELLO messages."
and "TLS servers MUST NOT negotiate or use SSL 2.0" and later "TLS servers
that do not support SSL 2.0 MAY accept version 2.0 CLIENT-HELLO messages as
the first message of a TLS handshake for interoperability with old clients."
Taken together, I find these statements quite confusing, if not outright
self-contradictory.  Maybe, a "However" might fix the problem, though: 

	TLS servers MUST NOT negotiate or use SSL 2.0; however, TLS servers 
	MAY accept SSL 2.0 CLIENT-HELLO messages as the first message of a 
	TLS handshake in order to maintain interoperability with legacy 
	clients.