RE: [Sip] draft-jennings-sip-hashcash-01
"Francois Audet" <audet@nortel.com> Thu, 24 February 2005 23:49 UTC
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From: Francois Audet <audet@nortel.com>
To: 'David R Oran' <oran@cisco.com>
Subject: RE: [Sip] draft-jennings-sip-hashcash-01
Date: Thu, 24 Feb 2005 18:44:42 -0500
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Cc: 'Cullen Jennings' <fluffy@cisco.com>, "'sip@ietf.org'" <sip@ietf.org>
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Hi Dave, I understand this. I guess I wasn't clear. It is in the OTHER direction that I see a problem. I mean when the UAC is, for example, a big gateway. In other words, if a bunch of SIP "phones" UAS all decide to send 419's to the UAC in the Gateway. > -----Original Message----- > From: David R Oran [mailto:oran@cisco.com] > Sent: Thursday, February 24, 2005 12:53 > To: Audet, Francois [SC100:9T51:EXCH] > Cc: 'Cullen Jennings'; 'sip@ietf.org' > Subject: Re: [Sip] draft-jennings-sip-hashcash-01 > > > > On Feb 24, 2005, at 2:30 PM, Francois Audet wrote: > > > We may need to explain some of the limitations of this. It > seems to me > > that this mechanism would not be terribly appropriate for > applications > > that aggregate a large number of clients onto a single > platform. For > > example, this may be too computationally intensive for a > large PSTN > > Gateway, or even a large Proxy. > > > That's the whole point! It's to prevent too many calls from > one place. > It's always under the calling UACs prerogative to give up > with "what a > bozo who wants me to blow smoke out of my Pentium for 2000ms. > Guess he > doesn't want to get the call, huh"? > > I suspect a decently managed UA would only force you not the puzzle > palace if you weren't on the buddy list, or some other whitelist. > > > Any ideas of how a UAS would make the decision to send the > 419 without > > burdening the UAC? Should there be a supported/require > header for this > > functionality, so that a UAC could "opt out"? > If the UAC can opt out the whole exercise is useless. > > > -----Original Message----- > > From: sip-bounces@ietf.org [mailto:sip-bounces@ietf.org] On > Behalf Of > > Cullen Jennings > > Sent: Tuesday, February 22, 2005 16:46 > > To: sip@ietf.org > > Subject: [Sip] draft-jennings-sip-hashcash-01 > > > > > > I updated this draft on "SIP Computational Puzzles" so it > has enough > > detail to implement it. (Previous version did not). It is in the > > drafts directory and also in HTML form at: > > > > > http://scm.sipfoundry.org/rep/ietf-drafts/fluffy/draft-jennings-sip- > > hashcash-01.html > > > > Cullen > > _______________________________________________ > > 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 > David R. Oran > Cisco Fellow > Cisco Systems > 7 Ladyslipper Lane > Acton, MA 01720 USA > Tel: +1 978 264 2048 > Email: oran@cisco.com > >
_______________________________________________ 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