[Dnsmasq-discuss] Does dnsmasq support cname within same domain?

[Frank Liu]

On Tue, Mar 1, 2022 at 2:39 PM Geert Stappers via Dnsmasq-discuss <
dnsmasq-discuss at lists.thekelleys.org.uk> wrote:

> On Tue, Mar 01, 2022 at 09:21:58AM -0800, Frank Liu wrote:
> > On Tue, Mar 1, 2022 at 3:37 AM Geert Stappers via Dnsmasq-discuss wrote:
> > > On Tue, Mar 01, 2022 at 01:01:51AM -0800, Frank Liu wrote:
> > > > Hi,
> > > >
> > > > I am running dnsmasq for dhcp/dns of a local test domain:
> test.example.com.
> > > > Everything works fine. When a dhcp client (eg: client1) comes up, it
> gets
> > > > the IP from dnsmasq, and I can dig/nslookup client1.test.example.com
> to get
> > > > its IP.
> > > >
> > > > When I add a cname in the same domain, eg:
> > > > cname=alias.test.example.com,client1.test.example.com
> > > >
> > > > dig/nslookup of alias.test.example.com only returns name
> > > > client1.test.example.com, not the actual IP of
> client1.test.example.com
> > > >
> > > > It's interesting that if I add the cname for a different domain, eg:
> > > > cname=alias.dummy.example.com,client1.test.example.com
> > > >
> > > > dig/nslookup of alias.dummy.example.com will return both name
> > > > client1.test.example.com and its IP.
> > > >
> > > > I tried a few different versions but that doesn't make a difference.
> > >
> > > Please name those different versions.
> > >
> >
> > 2.76 (Debian 9),   2.85 (Debian 11).
>
>
> Ah, I'm now beyond the ambiguty of different version of dig/nslookup.
>

I don't think it matters with test OS or test application.
I also tried:
ping alias.dummy.example.com works, but ping alias.test.example.com gives
unknown host error.
(even though both names cname to the same client1.test.example.com in
dnsmasq).

I tried ping from various machines (Mac, Windows, Debian 9, Debian11) on
the test network. Same result.

I also tried curl alias.test.example.com which gives: curl: (6) Could not
resolve host: alias.test.example.com
but curl alias.dummy.example.com works fine.


>
>
>
> > > > Is this a known issue/limitation?
> > >
> > > What is the actual question?
> > >
> >
> > Sorry, the question is in the email Subject. I guess it isn't clear, so I
> > am pasting here:
> > Does dnsmasq support cname within same domain?
>
> :-)
>
> I think it is more a dns-client problem as a dnsmasq problem.
> As in: I don't yet understand the "problem".
>

Are you implicitly answering my question in the subject line with a "Yes"
answer, because if the answer is "no", there is really no need to
troubleshoot any further.

Frank
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