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

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>NUT</short>
  <description>Network UPS Tools (NUT) is a protocol that allows to monitor and control power devices like uninterruptible power supplies.</description>
  <port port="3493" protocol="tcp"/>
  <!-- <port port="3493" protocol="udp"/> according to upstream never really worked over UDP -->
</service>