<div dir="ltr">added both tcp and udp port 53, still seeing the log messages. <div><br></div><div>Best,</div><div><br></div><div>Shiling</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 21, 2016 at 5:45 PM, Anand Buddhdev <span dir="ltr"><<a href="mailto:anandb@ripe.net" target="_blank">anandb@ripe.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 22/11/2016 00:27, schilling wrote:<br>
<br>
> Thanks for the insight.<br>
> I added the following rule<br>
> sudo firewall-cmd --permanent --direct --get-all-rules<br>
> [sudo] password for admin:<br>
> ipv4 filter OUTPUT 0 -d 10.10.10.100 -p tcp -m tcp --dport=53 -j ACCEPT<br>
> where 10.10.10.100 is our DNS master, still receiving the error.<br>
<br>
Why have you only allowed TCP port 53? What about UDP port 53? BIND<br>
first sends a UDP query to the master for the zone's SOA record, to<br>
determine if it needs to transfer the zone or not.<br>
<br>
Regards,<br>
Anand<br>
</blockquote></div><br></div>