[dns-operations] Adding CNAME for the root domain issue

[Paul Vixie]

Fred Morris wrote:
> On Fri, 29 Apr 2016, Paul Vixie wrote:>
>> Fred Morris wrote:
>>> So in our last installment, it was seen that a CNAME for a "zone apex" looks
>>> ok (returns SOA, NS, MX, etc) ...
>> no.
>
> Yes. Yes it does Paul, with BIND. If you flush the cache first. If you
> look closely, you see that the rname in the SOA record doesn't match the
> domain you queried for.

your example is instructive.

the above text sounded as if you had found a way to place a CNAME at the 
zone apex. the example below is fine.

re:

>
> --
>
> Fred
>
> --
>
> m3047 at sophia:~>  dig foo.m3047 soa
>
> ;<<>>  DiG 9.9.4-rpz2.13269.14-P2<<>>  foo.m3047 soa
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16568
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 2
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;foo.m3047.			IN	SOA
>
> ;; ANSWER SECTION:
> foo.m3047.		600	IN	CNAME	BAR.m3047.
> BAR.m3047.		600	IN	SOA	HERA.m3047.
> M3047.M3047.NET. 120417016 600 60 86400 600
>
> ;; AUTHORITY SECTION:
> BAR.m3047.		600	IN	NS	HERA.m3047.
>
> ;; ADDITIONAL SECTION:
> HERA.m3047.		600	IN	A	10.0.0.221
>
> ;; Query time: 5 msec
> ;; SERVER: 10.0.0.220#53(10.0.0.220)
> ;; WHEN: Fri Apr 29 18:54:47 PDT 2016
> ;; MSG SIZE  rcvd: 142
>

-- 
P Vixie