nanog mailing list archives
Re: DNS question, null MX records
From: Mark Andrews <marka () isc org>
Date: Thu, 17 Dec 2009 07:20:41 +1100
In message <167CAB40-71D7-4BF9-988A-1A188B433C37 () hopcount ca>, Joe Abley writes :
On 2009-12-15, at 19:09, Tony Finch wrote:On Tue, 15 Dec 2009, Florian Weimer wrote:* Eric J. Esslinger: =20I found a reference to a null MX proposal, constructed so: example.com IN MX 0 .=20 I think this is quite controversal.=20 My impression from discussions on various IETF lists is that most =peoplethink it is a good idea, it is already reasonably widely implemented, =butno-one has the time and persistence to push a spec through to =publication. When I attempted to document a similar idea (using an empty label in the = MNAME field of an SOA record in order to avoid unwanted DNS UPDATE = traffic) the consensus of the room was that the idea was both = controversial and bad :-) http://tools.ietf.org/html/draft-jabley-dnsop-missing-mname-00
Well UPDATE traffic is supposed to go to the nameservers listed in the NS RRset prefering the MNAME if and only if the MNAME is a nameserver. Lots of update clients don't do it quite right but there are some that actually send to all the nameservers. Setting the MNAME to "." does not actually address the problem. Mark
Joe
-- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
Current thread:
- DNS question, null MX records Eric J Esslinger (Dec 15)
- RE: DNS question, null MX records Mark Scholten (Dec 15)
- Re: DNS question, null MX records Florian Weimer (Dec 15)
- Re: DNS question, null MX records Tony Finch (Dec 15)
- Re: DNS question, null MX records Daniel Senie (Dec 15)
- Re: DNS question, null MX records Joe Abley (Dec 16)
- Re: DNS question, null MX records Mark Andrews (Dec 16)
- RE: DNS question, null MX records Brian Dickson (Dec 16)
- Re: DNS question, null MX records Joe Abley (Dec 16)
- Re: DNS question, null MX records Tony Finch (Dec 15)
- Re: DNS question, null MX records Joe Abley (Dec 16)
- Re: DNS question, null MX records Douglas Otis (Dec 15)
- Re: DNS question, null MX records Mark Andrews (Dec 15)
- Re: DNS question, null MX records Tony Finch (Dec 16)