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

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>SLP</short>
  <description>The Service Location Protocol (SLP) is used for discovering services in a local network without prior configuration.</description>
  <port port="427" protocol="tcp"/>
  <port port="427" protocol="udp"/>
</service>