On Thu, Jul 13, 2017 at 3:33 PM, <b...@zq3q.org> wrote: > Hi Niall: > > On Tue 7/11/17 22:56 +0100 "Niall O'Reilly" wrote: > > On 11 Jul 2017, at 22:01, b...@zq3q.org wrote: > > > > > As I wrote to Niall (msg dated 11 Jul 2017 15:04:32 -0500) , > > > > That hasn't reached me yet. > > > > > I **do not** have a NS record for each of my two > > > nameservers, in the domain zone that the respective nameserver itself > is in. > > > That is a mistake, I need to fix, right? > > > > Short answer: just no. > > > > Long answer: not unless either of your servers is providing name service > for > > the zone that the nameserver itself is in. As I understand from your > > original message, this is not the case, so just no. > > Thanks much! > > -- > Check my comprehension: > > So, **delegation** NS records are only needed in the zone which has an > $ORIGIN, > which is 1 level up from the $ORIGIN in the zone that contains the > nameserver SOA, and > authority NS records in. If this zone with delegation NS records is a > subdomain > of a TLD, then one adds these delegation NS records by using the > registrar's > interface to the TLD registry. > > -- > regards, > Tom >
Let's illustrate one NS record, for each of the cases: (I think your case is #2) 1. Name server name inside the domain itself example.com zone: example.com IN NS ns.example.com ns.example.com IN A x.x.x.x the TLD com would have (entered by the registrar) example.com IN NS ns.example.com ns.example.com IN A x.x.x.x (this is a "glue" record) 2. Name server name in another domain: example.com zone: example.com IN NS ns.otherdomain.com TLD com zone: example.com IN NS ns.otherdomain.com (no glue record) otherdomain.com zone: ns.otherdomain.com IN A x.x.x.x 3. Sibling domains with name servers for each other: (should be avoided?) example.com zone: example.com IN NS ns.otherdomain.com ns.example.com IN A x.x.x.x otherdomain.com zone: otherdomain.com IN NS ns.example.com ns.otherdomain.com IN A x.x.x.x TLD com zone: example.com IN NS ns.otherdomain.com ns.example.com IN A x.x.x.x (glue record?) ns.otherdomain.com IN A x.x.x.x (glue record?) -- Bob Harold
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