Re: [tram] I-D Action: draft-ietf-tram-turn-server-discovery-11.txt
"Karl Stahl" <karl.stahl@ingate.com> Tue, 10 January 2017 10:53 UTC
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From: Karl Stahl <karl.stahl@ingate.com>
To: "'Tirumaleswar Reddy (tireddy)'" <tireddy@cisco.com>, tram@ietf.org
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Date: Tue, 10 Jan 2017 11:52:53 +0100
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Subject: Re: [tram] I-D Action: draft-ietf-tram-turn-server-discovery-11.txt
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Hi Tiru, You said> This revision addresses comments received from Ben during ISEG review --- Not really - The (D)TLS mandating was Author's idea to throw into version -10 during the discuss and remains in this version -11, breaking the consensus text since version -7. --- And do you remember Ben's: Från: tram [mailto:tram-bounces@ietf.org] För Ben Campbell Skickat: den 11 oktober 2016 23:08 Till: Tirumaleswar Reddy Kopia: Prashanth Patil; tram-chairs@ietf.org; tram@ietf.org; draft-ietf-tram-turn-server-discovery@ietf.org; Simon Perreault; The IESG Ämne: Re: [tram] Ben Campbell's Discuss on draft-ietf-tram-turn-server-discovery-09: (with DISCUSS and COMMENT) ... "I saw a comment on my DISCUSS email thread from Karl Stahl, stating that DTLS could not be mandated. Has that input been considered? (I don't have an opinion; I just want to make sure people noticed the comment.)" Let's get this done in connection with next email "[tram] Maybe we have (D)TLS consensus; WAS: draft-ietf-tram-turn-server-discovery" thread, in the connection with the technical discussion you brought up again. I have another question relating to what Author's have in mind regarding the "explicit administrator choice" in the text under 9 Security Considerations: "In some auto-discovery scenarios, it might not be possible for the TURN client to use (D)TLS authentication to validate the TURN server. However, fall-back to clear text in such cases could leave the TURN client open to on-path injection of spoofed TURN messages. A TURN client could fall back to encryption-only (D)TLS when (D)TLS authentication is not available, but MUST NOT fall back without explicit administrator choice. Another reason to fall-back to encryption-only is for privacy, which is analogous to SMTP opportunistic encryption [RFC7435] where one does not require privacy but one desires privacy when possible. A TURN client could fall back to clear text if it does not support unauthenticated (D)TLS, but MUST NOT fall back without explicit administrator choice. Fallback to clear text is NOT RECOMMENDED because it makes the client more susceptible to man-in-the-middle attacks and on-path packet injection." If this should be applicable to TURN servers provided by the local or access network, do you mean - There is some (static) configuration to be done e.g. in the WebRTC browser OR - The network administrator stands behind the WebRTC browser user and pushes some button on the screen that the TURN client somehow puts as a choice on the user's screen OR - ??? And should whatever is meant happen at the enterprise LAN and also at the Internet Café and at the Airport free WiFi? Now that Author's in this -11 draft have put in these two MUST NOT instead of SHOULD, such text cannot be ignored anymore. And please understand: This is a DISCOVERY draft - We simply cannot have MUST statements relating to the USAGE of TURN servers. That must be left to other drafts, understanding the use case and requirements, like the RETURN draft for WebRTC TURN clients usage of the discovered TURN server. More technical in next email... And if we can agree on what is said there, cannot all of this (which is very hard to understand, even if I try) be removed? /Karl -----Ursprungligt meddelande----- Från: tram [mailto:tram-bounces@ietf.org] För Tirumaleswar Reddy (tireddy) Skickat: den 15 december 2016 07:19 Till: tram@ietf.org Ämne: Re: [tram] I-D Action: draft-ietf-tram-turn-server-discovery-11.txt This revision addresses comments received from Ben during ISEG review. -Tiru > -----Original Message----- > From: tram [mailto:tram-bounces@ietf.org] On Behalf Of internet- > drafts@ietf.org > Sent: Thursday, December 15, 2016 11:47 AM > To: i-d-announce@ietf.org > Cc: tram@ietf.org > Subject: [tram] I-D Action: draft-ietf-tram-turn-server-discovery-11.txt > > > A New Internet-Draft is available from the on-line Internet-Drafts directories. > This draft is a work item of the TURN Revised and Modernized of the IETF. > > Title : TURN Server Auto Discovery > Authors : Prashanth Patil > Tirumaleswar Reddy > Dan Wing > Filename : draft-ietf-tram-turn-server-discovery-11.txt > Pages : 15 > Date : 2016-12-14 > > Abstract: > Current Traversal Using Relays around NAT (TURN) server discovery > mechanisms are relatively static and limited to explicit > configuration. These are usually under the administrative control of > the application or TURN service provider, and not the enterprise, > ISP, or the network in which the client is located. Enterprises and > ISPs wishing to provide their own TURN servers need auto discovery > mechanisms that a TURN client could use with no or minimal > configuration. This document describes three such mechanisms for > TURN server discovery. > > This draft updates [RFC5766] to relax the requirement for mutual > authentication in certain cases. > > > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-tram-turn-server-discovery/ > > There's also a htmlized version available at: > https://tools.ietf.org/html/draft-ietf-tram-turn-server-discovery-11 > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-tram-turn-server-discovery-11 > > > Please note that it may take a couple of minutes from the time of submission > until the htmlized version and diff are available at tools.ietf.org. > > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ > > _______________________________________________ > tram mailing list > tram@ietf.org > https://www.ietf.org/mailman/listinfo/tram _______________________________________________ tram mailing list tram@ietf.org https://www.ietf.org/mailman/listinfo/tram
- [tram] I-D Action: draft-ietf-tram-turn-server-di… internet-drafts
- Re: [tram] I-D Action: draft-ietf-tram-turn-serve… Tirumaleswar Reddy (tireddy)
- Re: [tram] I-D Action: draft-ietf-tram-turn-serve… Karl Stahl