Danny Mayer wrote: > tglassey wrote: > >> Danny Mayer wrote: >> >>>>>> By geography, just like the zones that were mentioned in the post >>>>>> above. >>>>>> However, they are more fine-grained, especially when compared with >>>>>> large zones like us or eu. >>>>>> >>>>>> >>>>>> >>>>> How are you going to know the geography. DNS clients does not supply >>>>> that information even if they knew it and it's certainly not part of >>>>> the >>>>> DNS protocol. >>>>> >>>>> >>>> Danny isnt the location data potentially available as part of HOST >>>> listings and Location Records? >>>> >>>> >>> What Host listings and Location Records? There are no such types >>> available in DNS and even if they were they would not be local to the >>> nameserver responding. In any case such records would be entirely >>> voluntary, ie never added to a nameserver anywhere. >>> >>> >> Ah, let me be clearer - I didn't say lots of people were using it, and >> it is as well as defining Well Known Services. As it happens though >> there are some folks who do use these. Especially true with some of the >> military BF (battle field) process equipment. >> > > This makes no sense. The are no such types and so they cannot be used > even if they existed. Furthermore the only entry in the request is the > name for which an address is requested. The client does not even send > the request directly to the authoritative server. It makes a request via > a resolving server and that is the server that contacts the > authoritative server. The authoritative server has no knowledge > whatsoever not only of the client but what it intends to do with the > returned addresses. > Right - explain that to Vix will ya? - http://tools.ietf.org/html/rfc1876 > As for Well Known Services I assume you are talking about SRV records > You mean RFC2782 specfied SRV records - sure they work but so do the legacy Location Records and the WKS1035) can have this data in them as well. > but those don't even come into the picture here. BF process equipment > don't use DNS for this kind of stuff.
Here is one of many papers on location specific information in DNS - https://www.cs.tcd.ie/~htewari/papers/acts99.pdf > I suggest you pick up a good book > on DNS so you can understand how this works. DNS and BIND by Cricket Liu > is the usual recommendation... Thanks I have two copies of it (Editions 1 and 2). Todd > Danny > > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.375 / Virus Database: 270.12.93/2205 - Release Date: 06/27/09 > 05:53:00 > > _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions