forward first: iterative or recursive query

[iharrathi.ext at orange-ftgroup.com]

Hi,
i have a server called server1 that is acting as a cache server( recursion none). And i forward the zone example.com to server2 which has recursion enabled and master on some zone like example.com.
 this is the forwarding zone on server1:
zone "example.com" {
        type forward;
        forward only;
        forwarders { IP_of server2;  };
};
and server2 is master of the zone example.com:

zone "example.com" {
        type master;
        file "master/db.example.com";
};


BUT the problem is here:
db.example.com:
....
$ORIGIN example.com.
www                       A        1.2.3.4
ftp                          CNAME      www.abc.com<http://www.abc.com>



server1 can resolve www.example.com<http://www.example.com>, but can't resolve ftp.example.com<ftp://ftp.example.com> since the server2 sends the answer which is www.abc.com<http://www.abc.com> and not the IP, and my server1 can't make recursion to resolve www.abc.com<http://www.abc.com>.

why?
from server1 when i dig on server2: dig @IP-server2 www.example.com<http://www.example.com> it sends to me the IP, all is OK!!! but with a forwarding statement it sends only the CNAME

server1 is bind9.6-ESV-R4  et server2 bind-9.4.2

Thanks.
Issam HARRATHI

________________________________
De : Chris Buxton [mailto:chris.p.buxton at gmail.com]
Envoyé : mercredi 4 mai 2011 08:49
À : HARRATHI Issam Ext OLNC/DPS
Cc : bind-users at lists.isc.org
Objet : Re: forward first: iterative or recursive query

With a static-stub zone, you would get an iterative query. Forwarding always results in a recursive query.

How are you determining that your server is sending an iterative query?

Can we (the list) see your named.conf?

Regards,
Chris Buxton
BlueCat Networks

On May 3, 2011, at 5:21 AM, <iharrathi.ext at orange-ftgroup.com<mailto:iharrathi.ext at orange-ftgroup.com>> <iharrathi.ext at orange-ftgroup.com<mailto:iharrathi.ext at orange-ftgroup.com>> wrote:

Hi
from the book DNS and Bind 5th edition [french] (o'reilly)
I read that the forward with the mode first sends a recursive query to the servers on the forwarders list, but as i see it only sends an iterative query. Also with forward only it send an itérative query.
So forward first send an itérative or recursive query?

And how i can send a recursive query with the statement forward ( without using static-stub)
I'm using bind-9.6-ESV-R4

Thanks.
Issam HARRATHI.

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