RE: [Sip] draft-jennings-sip-hashcash-01
"Francois Audet" <audet@nortel.com> Thu, 03 March 2005 19:48 UTC
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From: Francois Audet <audet@nortel.com>
To: 'Cullen Jennings' <fluffy@cisco.com>, 'Jonathan Rosenberg' <jdrosen@cisco.com>
Subject: RE: [Sip] draft-jennings-sip-hashcash-01
Date: Thu, 03 Mar 2005 14:46:00 -0500
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As a separate note, shouldn't we try to solve the HERFP problem? > -----Original Message----- > From: sip-bounces@ietf.org [mailto:sip-bounces@ietf.org] On > Behalf Of Cullen Jennings > Sent: Wednesday, March 02, 2005 12:16 > To: Jonathan Rosenberg > Cc: sip@ietf.org > Subject: Re: [Sip] draft-jennings-sip-hashcash-01 > > > On 3/2/05 2:15 AM, "Jonathan Rosenberg" <jdrosen@cisco.com> wrote: > > > 1. The mechanism interacts badly with forking at the moment. One > > problem is HERFP. If I have a mix of endpoints, some of > which support > > this (and thus send a 419), and others that don't (and thus > ring the > > phone), then you'll end up always completing the call on > the endpoints > > that don't support the extension. > > Good point. I think will mention this in the draft but > clearly I won't attempt to solve the well studied HERFP > problem. As a separate issues, some day the WG should discuss > the limitations of the "If it hurts don't do it" solution to > the HERFP problem. > > > > > 2. THe mechanism doesn't provide a way for a proxy to aggregate > > multiple Puzzle headers from forked branches. It needs to > do something > > like WWW-Authenticate where a proxy collects these from the various > > 419 and places all of them in the 419 forwarded upstream. That will > > also require something akin to realm, that allows a > UA/proxy to pull > > out its own puzzle. > > Oops. Excellent point. Thanks, will fix this. > > > _______________________________________________ > Sip mailing list https://www1.ietf.org/mailman/listinfo/sip > This list is for NEW development of the core SIP Protocol > Use sip-implementors@cs.columbia.edu for questions on current > sip Use sipping@ietf.org for new developments on the > application of sip > >
_______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors@cs.columbia.edu for questions on current sip Use sipping@ietf.org for new developments on the application of sip
- [Sip] draft-jennings-sip-hashcash-01 Cullen Jennings
- Re: [Sip] draft-jennings-sip-hashcash-01 Dan Wing
- RE: [Sip] draft-jennings-sip-hashcash-01 Francois Audet
- Re: [Sip] draft-jennings-sip-hashcash-01 Jonathan Rosenberg
- Re: [Sip] draft-jennings-sip-hashcash-01 Dan Wing
- Re: [Sip] draft-jennings-sip-hashcash-01 Michael Thomas
- Re: [Sip] draft-jennings-sip-hashcash-01 Henning Schulzrinne
- [Sip] jennings-sip-hashcash - does it help - does… Cullen Jennings
- Re: [Sip] draft-jennings-sip-hashcash-01 Cullen Jennings
- [Sip] Re: jennings-sip-hashcash - does it help - … Michael Thomas
- Re: [Sip] draft-jennings-sip-hashcash-01 Cullen Jennings
- Re: [Sip] draft-jennings-sip-hashcash-01 Henning Schulzrinne
- [Sip] Re: jennings-sip-hashcash - does it help - … Jonathan Rosenberg
- RE: [Sip] draft-jennings-sip-hashcash-01 Francois Audet
- Re: [Sip] draft-jennings-sip-hashcash-01 Jonathan Rosenberg
- Re: [Sip] draft-jennings-sip-hashcash-01 David R Oran
- RE: [Sip] draft-jennings-sip-hashcash-01 Francois Audet
- RE: [Sip] draft-jennings-sip-hashcash-01 Francois Audet
- Re: [Sip] draft-jennings-sip-hashcash-01 Cullen Jennings