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<div class="moz-cite-prefix">On 22/11/2020 20:21, Yves Goergen via
Pdns-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8b8ce834-8722-8c60-c200-08081ea63f5d@unclassified.de">I've
noticed that the PDNS server listens on more than the configured
ports. There are several other UDP ports open:
<br>
<br>
<blockquote type="cite" style="color: #007cff;">ss -ulpn |egrep
'State|pdns'
<br>
State Recv-Q Send-Q Local Address:Port Peer Address:Port
Process
<br>
UNCONN 0 0 192.168.81.35:53 0.0.0.0:*
users:(("pdns_server",pid=1585,fd=5))
<br>
UNCONN 0 0 127.0.0.1:53 0.0.0.0:*
users:(("pdns_recursor",pid=1077,fd=4))
<br>
UNCONN 0 0 0.0.0.0:19990 0.0.0.0:*
users:(("pdns_server",pid=1585,fd=18))
<br>
UNCONN 0 0 [::]:53 [::]:*
users:(("pdns_server",pid=1585,fd=6))
<br>
UNCONN 0 0 *:13618 *:*
users:(("pdns_server",pid=1585,fd=19))
<br>
</blockquote>
<br>
Here it's port numbers 19990 and 13618. Other servers seem to have
other port numbers.
<br>
<br>
What does that mean? Is it used for something? Can it be
configured away?
</blockquote>
<p>AFAIK, pdns_server doesn't *listen* on those additional ports,
but it creates and binds UDP sockets for the purpose of *sending*
outbound packets - specifically, notifies to secondaries.</p>
Regards,
<p>Brian.<br>
</p>
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