Split-DNS (views) - slave sending updates to itself

[Chris Buxton]

What version of BIND are you using? I remember that behavior from the
9.3 series, but I'm pretty sure it was fixed in 9.4.

Regards,
Chris Buxton
BlueCat Networks

On 7/8/11, Ewald Jenisch <a at jenisch.at> wrote:
> Hi,
>
> After getting up my split-DNS using views and TSIG (thanks to all who
> responded) I run into a, let's say "weird behavior":
>
> Whenever I receive a zone-update for the external zone on the slave,
> it (the slave) seems to send out a notify for the zone in question via
> the internal view to itself - i.e. the slave notifies itself of the
> update.
>
> Here's what I get in the log on the slave server:
>
> 08-Jul-2011 13:10:52.322 client 192.168.5.61#55119: view external-view:
> received notify for zone 'v6.test.at': TSIG 'ns1-and-ns2-external'
> 08-Jul-2011 13:10:52.325 transfer of 'v6.test.at/IN/external-view' from
> 192.168.5.61#53: connected using 192.168.5.62#11464
> 08-Jul-2011 13:10:52.430 transfer of 'v6.test.at/IN/external-view' from
> 192.168.5.61#53: Transfer completed: 1 messages, 10 records, 423 bytes,
> 0.105 secs (4028 bytes/sec)
> 08-Jul-2011 13:10:52.430 zone v6.test.at/IN/external-view: sending notifies
> (serial 2011070810)
> 08-Jul-2011 13:10:52.822 client 2001:db8:2208:1005::10#51736: view
> external-view: received notify for zone 'v6.test.at': TSIG
> 'ns1-and-ns2-external'
> 08-Jul-2011 13:10:52.836 client 192.168.5.62#61706: view internal-view:
> received notify for zone 'v6.test.at'
> 08-Jul-2011 13:10:52.836 client 2001:db8:2208:1005::11#61962: view
> internal-view: received notify for zone 'v6.test.at'
>
> with 192.168.5.61 (IPv6 2001:db8:2208:1005::10) being the master,
> 192.168.5.62 (IPv6 2001:db8:2208:1005::11) being the slave.
>
> So if my interpretation from the above log is correct the slave
> receives the update from the master for the external-view up and
> including the line that says "client 2001:db8:2208:1005::10#51736:
> view external-view: received notify for zone 'v6.test.at': TSIG
> 'ns1-and-ns2-external'".
>
> What follows though is really weird:
> 08-Jul-2011 13:10:52.836 client 192.168.5.62#61706: view internal-view:
> received notify for zone 'v6.test.at'
> 08-Jul-2011 13:10:52.836 client 2001:db8:2208:1005::11#61962: view
> internal-view: received notify for zone 'v6.test.at'
>
> Why by all means does the slave send out a notify to itself?
>
>
> Any clues on what's going on here?
>
> Thanks much in advance for your help,
> -ewald
>
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