Interesting behavior with wildcard domains

[Mathew Ian Eis]

This is what I was looking for - thanks!

From: <bind-users-bounces at lists.isc.org<mailto:bind-users-bounces at lists.isc.org>> on behalf of "Darcy Kevin (FCA)" <kevin.darcy at fcagroup.com<mailto:kevin.darcy at fcagroup.com>>
Date: Tuesday, February 23, 2016 at 4:29 PM
To: "bind-users at lists.isc.org<mailto:bind-users at lists.isc.org>" <bind-users at lists.isc.org<mailto:bind-users at lists.isc.org>>
Subject: RE: Interesting behavior with wildcard domains

See “empty non-terminal” in https://www.rfc-editor.org/rfc/rfc4592.txt.

                                                                                                - Kevin


From: bind-users-bounces at lists.isc.org<mailto:bind-users-bounces at lists.isc.org> [mailto:bind-users-bounces at lists.isc.org] On Behalf Of Noel Butler
Sent: Tuesday, February 23, 2016 6:19 PM
To: bind-users at lists.isc.org<mailto:bind-users at lists.isc.org>
Subject: Re: Interesting behavior with wildcard domains


On 24/02/2016 09:13, Mathew Ian Eis wrote:
Hi BIND,

I've encountered (quite by accident) an interesting behavior in BIND with wildcard domains:

The relevant configuration is a zone; e.g. bar.com, with what I'll call a "second level" wildcard host, e.g. *.foo.bar.com A 10.10.10.5 in that zone. (as opposed to what might be considered the more usual wildcard host record of *.bar.com).

buz.foo.bar.com returns A 10.10.10.5 as expected.

However, a query for foo.bar.com returns NOERR with zero results, when I would expect a NXDOMAIN.

Anyone know if the NOERR with zero results is the expected / correct behavior?

Thanks in advance,

Mathew Eis
Northern Arizona University
Information Technology Services


It's expected, since its a *  "." foo...
you are asking for anything thast dot foo, your not asking for foo


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