/usr/lib/firewalld/services/ Current File: //usr/lib/firewalld/services/collectd.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Collectd</short>
  <description>Collectd is a monitoring system that allows metrics to be sent over the network. This rule allows incoming collectd traffic from remote boxes.</description>
  <port protocol="udp" port="25826"/>
</service>