Guys,
REFRESH is set to 1 minute. That's not a long time to wait. Just do
a packet capture and see if the slave is issuing zone-refresh queries regularly
in the 30-second-to-1-minute range (it's randomized, of course, between
REFRESH/2 and full REFRESH).
If the slave isn't issuing refreshes, then check whether the zone got loaded
properly as a slave zone in the first place, and that the masters clause is set
properly.
If the slave *is* issuing refreshes, is it getting a response? Are the refresh
queries even showing up on the master side?
If the refresh queries are getting a response, but there's no AXFR/IXFR
following subsequently, look in the log files for some sort of resource issue,
e.g. concurrent zone transfers or something of that nature.
- Kevin
From: [email protected]
[mailto:[email protected]] On Behalf Of John W. Blue
Sent: Friday, February 19, 2016 2:19 PM
To: David Li
Cc: BIND Users
Subject: Re: A Zone Transfer Question
"kick off" as in update the zone and not by using dig.
John
Sent from Nine<http://www.9folders.com/>
From: "John W. Blue" <[email protected]<mailto:[email protected]>>
Sent: Feb 19, 2016 1:17 PM
To: David Li
Cc: BIND Users
Subject: Re: A Zone Transfer Question
Nothing in the logs, eg? Well so much for getting an easy resolution. :D
If you trust your conf files and logs are clean, I personally next to turn to
tcpdump. You really need to know what (if anything) is being placed on the
wire. Something like this should get you started:
tcpdump -i eth0 -n port domain
Kick off a transfer and see what happens.
John
Sent from Nine<http://www.9folders.com/>
From: David Li <[email protected]<mailto:[email protected]>>
Sent: Feb 19, 2016 1:04 PM
To: John W. Blue
Cc: BIND Users
Subject: Re: A Zone Transfer Question
Hi John,
Nothing in the /var/log/messages indicates transfer problems. In fact
I don't think the transfer ever started by itself for some reason
until I manually used "dig" to initiate.
David
On Fri, Feb 19, 2016 at 9:00 AM, John W. Blue
<[email protected]<mailto:[email protected]>> wrote:
> Hello David,
>
> You can get started by checking your log files to see if named is
> complaining about anything it might not like that is preventing the
> transfer.
>
> John
>
> Sent from Nine
>
> From: David Li <[email protected]<mailto:[email protected]>>
> Sent: Feb 19, 2016 10:46 AM
> To: BIND Users
> Subject: A Zone Transfer Question
>
> This is my first time to try master slave configuration. Here is a
> brief description:
>
> I have two Centos 7.1 VMs - each is configured for a zone. VM1 is the
> master for zone1 and slave for zone2. VM2 is master for zone2 and
> slave for zone1. Both zones uses DNS Dynamic Update from DHCP
> servers on the same VM
> to update the A records in their zone files. No DNSSEC configured.
>
>
> To start, everything seems to be working fine. I have one host in each
> zone and they can resolve each other fine.
>
> Now I add a new host to zone1 and its sequence number has been bumped
> up. I read that when the zone1 file changes, it will automatically
> notify its slave zone (ie. zone2) to start a zone transfer after 15
> min. This never happened. Then I restarted named on VM2 and hoped it
> would pull the new zone1 file. This didn't happened either.
> Eventually I have to either restart the VM2 or use dig to start the
> zone transfer.
>
> Can anyone spot anything obviously wrong here? Do I need to post my
> zone file and named.conf?
>
>
> Thanks.
>
> David
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