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<p>Hello,</p>
<p>I have installed PowerDNS from the Ubuntu repositories on Ubuntu 20.04 following this guide: <a href="https://kifarunix.com/easily-install-and-setup-powerdns-on-ubuntu-20-04/" target="_blank" rel="noopener noreferrer">https://kifarunix.com/easily-install-and-setup-powerdns-on-ubuntu-20-04/,</a></p>
<p>The installed version is:</p>
<p># pdns_server --version Oct 11 22:53:01 PowerDNS Authoritative Server 4.2.1 (C) 2001-2019 PowerDNS.COM BV Oct 11 22:53:01 Using 64-bits mode. Built using gcc 9.2.1 20200202.</p>
<p><br /></p>
<p>I want to use this as a superslave. For the master I am using NSD which is located at `box.mailinabox.info` IP 45.67.229.126 which serves two zones: mailinabox.info and test102.club.</p>
<p>This installation is located at either/both 'pdns.mailinabox.info' and 'ns3.box.mailinabox.info', IP 137.74.61.93.</p>
<p>I have set the variable superslave=yes in /etc/powerdns/pdns.conf.</p>
<p>I have not changed any other entries in the conf file, though when things did not work I experimented with adding the IP of the master in both allow-notify-from and allow-axfr-ips with no change in results.</p>
<p>I did insert to the supermasters table the following:</p>
<p>INSERT INTO supermasters VALUES ('45.67.229.126', 'ns3.box.mailinabox.info', 'info');</p>
<p>INSERT INTO supermasters VALUES ('45.67.229.126', 'pdns.mailinabox.info', 'info');</p>
<p><br /></p>
<p>When I update the master, its logs show this:<br /><br /></p>
<p>[2020-10-12 01:28:33.124] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.129] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.184] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.186] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.279] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.279] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.339] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.339] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.397] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.398] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.473] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.473] nsd[10133]: error: xfrd: zone mailinabox.info: max notify send count reached, 137.74.61.93 unreachable<br />[2020-10-12 01:28:33.474] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.474] nsd[10133]: error: xfrd: zone test102.club: max notify send count reached, 137.74.61.93 unreachable<br />[2020-10-12 01:28:33.532] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.533] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.592] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.592] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.672] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.672] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.731] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.732] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.792] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.793] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.868] nsd[10133]: error: xfrd: zone test102.club: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.868] nsd[10133]: error: xfrd: zone test102.club: max notify send count reached, 137.74.61.93 unreachable<br />[2020-10-12 01:28:33.869] nsd[10133]: error: xfrd: zone mailinabox.info: received notify response error REFUSED from 137.74.61.93<br />[2020-10-12 01:28:33.869] nsd[10133]: error: xfrd: zone mailinabox.info: max notify send count reached, 137.74.61.93 unreachable</p>
<p>Any idea what I may have missed, or what potentially is going wrong?</p>
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