[Pdns-users] PowerDNS authoritative server UDP port?

[Otto Moerbeek]

On Tue, Oct 29, 2019 at 08:33:29PM -0600, Aaron D. Gifford wrote:

> On a FreeBSD system running PowerDNS authoritative server 4.2.0, I noticed
> this:
> 
> # sockstat -4
> USER     COMMAND    PID   FD PROTO  LOCAL ADDRESS         FOREIGN ADDRESS
> 
> root     pdns_serve 40055 4  udp4   192.168.50.12:53     *:*
> root     pdns_serve 40055 6  tcp4   192.168.50.12:53     *:*
> root     pdns_serve 40055 8  tcp4   192.168.50.12:55401  127.0.0.1:3306
> root     pdns_serve 40055 9  tcp4   192.168.50.12:54277  127.0.0.1:3306
> root     pdns_serve 40055 16 udp4   192.168.50.12:19413  *:*
> ...
> 
> Why is it listening on UDP port 19413?  I thought I'd disabled various
> subsystems that might want to listen on a TCP or UDP port.
> 
> Thanks in advance for documentation pointers,
> Aaron out.

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These are the sockets used for (outgoing) communications between
master and slave.  There are created if slave, master or
forward-notify is set.

Confirmed by adding a debug statement, you can also see that the
sockets are not created if both master and slave are not set..

	-Otto