Thanks for this interesting feedback. Now I have the problem to detect this kind of bad configuration. If I have: Zone toto.be: toto.be. NS ns1.xxx.be + some records Zone titi.toto.be: titi.toto.be. NS ns1.xxx.be + some records. What will be the command to detect that zone toto.be has no NS for titi.toto.be ?? Regards, Hugo,
> Date: Tue, 13 Mar 2012 15:03:38 +0000 > From: c...@cam.ac.uk > To: hugo...@hotmail.com > CC: ben.crosw...@gmail.com; bind-users@lists.isc.org > Subject: Re: NS record for subzone definition > > On Mar 13 2012, hugo hugoo wrote: > > >Thanks for this clear feedback. > > > >I understand the problem if the subdomain is not on the same name servers > >as the domain. The NS record is needed to could find the subdomain on the > >other name server. > > > >You said that the NS is not mandatory (it will work fine in the short term) > >in case of the same name server for the domai nand the subdomain. But how > >does it work then if no NS is found? > > When asked about "tutu.titi.toto.be", the "be" nameservers give a referral > to the nameservers for "toto.be". When *they* are asked, if they are already > authoritative for the zone "titi.toto.be", they can answer the question > without giving another referral. > > But as has been pointed out, such a configuration is horribly fragile. The > set of nameservers (official *and* unofficial) for the zones have to be > the same, and it won't work anyway if the zones are signed, and so on. > > One question to ask is: if the set of nameservers for "toto.be" and > "titi.toto.be" are now and for evermore going to be the same, why would > you want to make them separate zones at all? A single zone can have > domain names nested as deep as you like[*] without you needing to make > a zone cut. > > [*] subject to the overall limit of 253 characters on the fully > qualified name > > -- > Chris Thompson > Email: c...@cam.ac.uk
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