Re: [Asrg] overloading server names doesn't work, was who has the message
Daniel Feenberg <feenberg@nber.org> Tue, 09 February 2010 12:12 UTC
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Date: Tue, 09 Feb 2010 07:11:58 -0500
From: Daniel Feenberg <feenberg@nber.org>
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Subject: Re: [Asrg] overloading server names doesn't work, was who has the message
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On Mon, 8 Feb 2010, John R Levine wrote: >>> ISP in the UK. Can you describe the DNS changes needed if they were >>> publishing a spam button address? >>> $ dig mail.btinternet.com a >>> ;; ANSWER SECTION: >>> mail.btinternet.com. 600 IN CNAME >>> pop-smtp.bt.mail.yahoo.com. >>> pop-smtp.bt.mail.yahoo.com. 1800 IN CNAME >>> pop-smtp.bt.mail.fy5.b.yahoo.com. >>> pop-smtp.bt.mail.fy5.b.yahoo.com. 300 IN A 217.12.13.134 >>> pop-smtp.bt.mail.fy5.b.yahoo.com. 300 IN A 217.146.188.192 >> >> I don't hack DNS records enought to be sure, but it appears to need exactly >> one new record: >> >> _report.pop-smtp.bt.mail.fy5.b.yahoo.com IN TXT abuse-report@yahoo.com > > Nope, that won't work. CNAMEs don't do a partial match. > >> _report.pop-smtp.bt.mail.fy5.b.yahoo.com IN TXT abuse-report@yahoo.com >> _report.pop-smtp.bt.mail.yahoo.com IN TXT abuse-report@yahoo.com >> _report.mail.btinternet.com IN TXT abuse-report@yahoo.com > > That won't work, either. You can't have DNS records below a CNAME. > > By the way, I was wrong about SRV records. This DNS hack just doesn't work, > but it won't work much more elegantly with RP records. See RFC 1183. > What is the objection to attaching the TXT record to the A record? I realize that it means that a single arf-reporting system must serve several CNAMEs, but that is a common requirement for many network services, and I rarely see complaints about it. Daniel Feenberg > Regards, > John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY > "I dropped the toothpaste", said Tom, crestfallenly. > _______________________________________________ > Asrg mailing list > Asrg@irtf.org > http://www.irtf.org/mailman/listinfo/asrg >
- [Asrg] Iteration #3. Chris Lewis
- Re: [Asrg] Iteration #3. Dave CROCKER
- Re: [Asrg] Iteration #3. Steve Atkins
- Re: [Asrg] Iteration #3. Chris Lewis
- Re: [Asrg] Iteration #3. Derek Diget
- Re: [Asrg] Iteration #3. Alessandro Vesely
- Re: [Asrg] Iteration #3. Chris Lewis
- Re: [Asrg] Iteration #3. Chris Lewis
- [Asrg] Consensus Call - submission via posting (w… Dave CROCKER
- Re: [Asrg] Consensus Call - submission via postin… Lyndon Nerenberg (VE6BBM/VE7TFX)
- Re: [Asrg] Consensus Call - submission via postin… Chris Lewis
- Re: [Asrg] Consensus Call - submission via postin… Steve Atkins
- Re: [Asrg] Consensus Call - submission via postin… Dave CROCKER
- Re: [Asrg] Consensus Call - submission via postin… Dotzero
- Re: [Asrg] Iteration #3. Derek Diget
- Re: [Asrg] Consensus Call - submission via postin… Derek Diget
- Re: [Asrg] Consensus Call - submission via postin… Bart Schaefer
- Re: [Asrg] Consensus Call - submission via postin… Alessandro Vesely
- Re: [Asrg] Iteration #3. Alessandro Vesely
- Re: [Asrg] Iteration #3. Daniel Feenberg
- Re: [Asrg] Iteration #3. John Levine
- Re: [Asrg] Iteration #3. Daniel Feenberg
- Re: [Asrg] Iteration #3. Dave CROCKER
- Re: [Asrg] Iteration #3. John Levine
- Re: [Asrg] Iteration #3. Dave CROCKER
- Re: [Asrg] Consensus Call - submission via postin… Ian Eiloart
- Re: [Asrg] Consensus Call - submission via postin… John Levine
- Re: [Asrg] Consensus Call - submission via postin… BOBOTEK, ALEX (ATTCINW)
- Re: [Asrg] Consensus Call - submission via postin… Andrew Richards
- [Asrg] who has the message (was Re: Consensus Cal… Dave CROCKER
- Re: [Asrg] Consensus Call - submission via postin… Chris Lewis
- Re: [Asrg] Consensus Call - submission via postin… Andrew Richards
- Re: [Asrg] who has the message (was Re: Consensus… Andrew Richards
- Re: [Asrg] who has the message (was Re: Consensus… Dave CROCKER
- Re: [Asrg] who has the message (was Re: Consensus… Chris Lewis
- Re: [Asrg] who has the message (was Re: Consensus… John Levine
- Re: [Asrg] who has the message (was Re: Consensus… Dave CROCKER
- Re: [Asrg] overloading server names doesn't work,… John R Levine
- Re: [Asrg] Consensus Call - submission via postin… Bill Cole
- Re: [Asrg] overloading server names doesn't work,… Daniel Feenberg
- Re: [Asrg] who has the message (was Re: Consensus… Ian Eiloart
- Re: [Asrg] Consensus Call - submission via postin… Ian Eiloart
- Re: [Asrg] who has the message (was Re: Consensus… Ian Eiloart
- Re: [Asrg] who has the message (was Re: Consensus… Andrew Richards
- Re: [Asrg] who has the message (was Re: Consensus… Andrew Richards
- Re: [Asrg] who has the message (was Re: Consensus… Ian Eiloart
- Re: [Asrg] who has the message (was Re: Consensus… Andrew Richards
- Re: [Asrg] who has the message (was Re: Consensus… Ian Eiloart
- Re: [Asrg] overloading server names doesn't work,… Dave CROCKER
- Re: [Asrg] who has the message (was Re: Consensus… Paul Russell
- Re: [Asrg] overloading server names doesn't work,… John R Levine
- Re: [Asrg] overloading server names doesn't work,… Dave CROCKER
- Re: [Asrg] DNS basics, was overloading server nam… John R Levine
- Re: [Asrg] Consensus Call - submission via postin… Andrew Richards
- Re: [Asrg] Consensus Call - submission via postin… Ian Eiloart
- Re: [Asrg] DNS basics, was overloading server nam… Dave CROCKER
- Re: [Asrg] DNS basics, was overloading server nam… John R Levine
- Re: [Asrg] Consensus Call - submission via postin… Jose-Marcio Martins da Cruz
- Re: [Asrg] DNS basics, was overloading server nam… Douglas Otis
- Re: [Asrg] Consensus Call - submission via postin… Ian Eiloart
- Re: [Asrg] Consensus Call - submission via postin… Jose-Marcio Martins da Cruz