can bind filter the result

[Ken Lai]

2009/4/20 JINMEI Tatuya / 神明達哉 <Jinmei_Tatuya at isc.org>:
> At Mon, 20 Apr 2009 08:40:15 +0800,
> Ken Lai <soulhacker511 at gmail.com> wrote:
>
>> for example, a user send a query to my server, and the server forward this
>> query to a outer dns server. the outer server return a A record to my server,
>> what i want to do is, my server will not respond to client if i do not want
>> the client to know this A record.
>
> It's still not very clear...what's the key of the filtering?  The
> query name such as www.isc.org, or the data of the answer (the IPv4
> address in the case of an A RR), or something else?
>
> ---
> JINMEI, Tatuya
> Internet Systems Consortium, Inc.
>

let's take an example. my DNS server called SrvA, the outer DNS server
called SrvB.

normally, the client sent the query to SrvA, and SrvA forwards it to
SrvB. and SrvA return a result which came from SrvB to the client.
unfortunately the SrvB sometimes will return a A record that is a
advertisement site ip to SrvA. so i dont want to respond  to client if
the returned IP address is the Advertisement site address.

filter the domain name may not be suitable.

thanks.