[MIPSHOP-MIH-DT] FW: DNS Early Warning: Score 40: Mobility Services Transport ProtocolDesign
Sam Xia <xiazhongqi@huawei.com> Tue, 30 October 2007 09:26 UTC
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Date: Tue, 30 Oct 2007 17:09:35 +0800
From: Sam Xia <xiazhongqi@huawei.com>
To: Gabor.Bajko@nokia.com
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Subject: [MIPSHOP-MIH-DT] FW: DNS Early Warning: Score 40: Mobility Services Transport ProtocolDesign
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Do you see the mail from Peter? Best Regards, Sam Xia -----Original Message----- From: Peter Koch [mailto:peter@denic.de] On Behalf Of Peter Koch Sent: Friday, October 05, 2007 9:28 PM To: Jari Arkko Cc: dns-dir@ops.ietf.org; dhc-chairs@tools.ietf.org; Mipshop Chairs Subject: Re: DNS Early Warning: Score 40: Mobility Services Transport ProtocolDesign On Fri, Oct 05, 2007 at 03:55:40PM +0300, Jari Arkko wrote: > Thanks for the review! Has anyone looked at the other document? I > think we need to. I did, a while ago. What bothers me that this is another attempt to use the DNS as a discovery mechanism, which is fatally wrong in my opinion. The draft <draft-bajko-mos-dns-discovery-00.txt> has some particular issues with using NAPTR based on RFC 2915 instead of DDDS and with specifying fallback mechanisms which have proven a bad idea in, e.g., the MX/A case. However, the fundamental problem I have with this approach is that it assumes that the searching entity is "in" a domain and knows about that. This more or less immediately leads to some DNS search (-> tree climbing; the draft mentioned above isn't specific about this, but similar approaches are) and it violates a paradigm that I consider important: it uses the DNS to publish information _for_ a domain (whatever that is) instead of information _about_ a domain. Assuming that a system knows which domain it is "in" means you can't have stable names, i.e., I want my laptop to be "unknown.denic.de" regardless of where it is. Then, using the config details published under "denic.de" probably won't help me when accessing the net via some hotspot that uses DNS based service discovery. There's a similar problem with a document in geopriv and a more recent one discussed on the int-area list which try to base servcie location on the availability and maintenance of the DNS reverse mapping. That's slightly better, because it bases sloc on location (through addresses, represented as reverse mapping entries), but still uses the DNS the wrong direction IMHO. -Peter _______________________________________________ MIPSHOP-MIH-DT mailing list MIPSHOP-MIH-DT@ietf.org https://www1.ietf.org/mailman/listinfo/mipshop-mih-dt