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

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Simple Service Discovery Protocol (SSDP)</short>
  <description>The Simple Service Discovery Protocol (SSDP) is a network protocol based on the Internet protocol suite for advertisement and discovery of network services and presence information.</description>
  <port protocol="udp" port="1900"/>
  <destination ipv4="239.255.255.250" ipv6="FF02::C"/>
</service>