Re: [http-state] Ticket 3: Public Suffixes
Adam Barth <ietf@adambarth.com> Sat, 16 January 2010 22:16 UTC
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From: Adam Barth <ietf@adambarth.com>
Date: Sat, 16 Jan 2010 14:16:32 -0800
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To: "Yngve N. Pettersen (Developer Opera Software ASA)" <yngve@opera.com>
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Cc: http-state <http-state@ietf.org>
Subject: Re: [http-state] Ticket 3: Public Suffixes
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On Sat, Jan 16, 2010 at 11:08 AM, Yngve N. Pettersen (Developer Opera Software ASA) <yngve@opera.com> wrote: > On Sat, 16 Jan 2010 19:18:48 +0100, Adam Barth <ietf@adambarth.com> wrote: > >> On Sat, Jan 16, 2010 at 3:39 AM, Yngve N. Pettersen (Developer Opera >> Software ASA) <yngve@opera.com> wrote: >>> >>> Alternative 4: Use a DNS based heuristic by only allowing cookies set to >>> domains that have an IP address defined. If there is no IP address, >>> remove >>> the domain attribute >> >> One problem with this approach is that a number of major ISPs, >> including COMCAST, return IP addresses for all non-existent domains. > > I know, and it could become a signifcant problem with the system, depending > on how those systems work. > > The question is though: Do they do this for domain.com if www.domain.com > exists? > > I know ISPs and others do this for unknown domains, but do they do it for > registered domains, or the public suffixes that actually have domains under > them? > > The situation in which the heuristics will operate is that > server.domain1.domain2.tld tries to set a cookie for domain2.tld. Would a > ISP highjack the name domain2.tld to display ads, even if domain2.tld is a > public suffix? I don't know, and I expect it varies from ISP to ISP. In general, though, whether or not a domain resolves is a fragile heuristic. These folks have strong business incentives for creating these records. Even if their current behavior is ok, we don't have any guarantees that it will remain so. >>> Alternative 5: (which require an extensive change of the cookie >>> specification) >> >> As Daniel Stenberg says, extensive changes to the spec are off the >> table in phase one. However, we should revisit this approach in phase >> two. > > Could elements of the cookie-v2 spec be used? For example to initiate a move > towards a better domain designation method? I don't think it's a good idea to defocus phase 1 by mixing in ideas for changing the protocol. The charter specifically forbids us from introducing new syntax or semantics. Adam
- [http-state] Ticket 3: Public Suffixes Adam Barth
- Re: [http-state] Ticket 3: Public Suffixes Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [http-state] Ticket 3: Public Suffixes Daniel Stenberg
- Re: [http-state] Ticket 3: Public Suffixes Adam Barth
- Re: [http-state] Ticket 3: Public Suffixes Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [http-state] Ticket 3: Public Suffixes Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [http-state] Ticket 3: Public Suffixes corvid
- Re: [http-state] Ticket 3: Public Suffixes Adam Barth
- Re: [http-state] Ticket 3: Public Suffixes Adam Barth
- Re: [http-state] Ticket 3: Public Suffixes Adam Barth
- Re: [http-state] Ticket 3: Public Suffixes Yngve N. Pettersen (Developer Opera Software ASA)
- [http-state] Meeting in Anaheim? David Morris
- Re: [http-state] Meeting in Anaheim? Bil Corry