Linux vacca.o2switch.net 4.18.0-553.123.2.lve.el8.x86_64 #1 SMP Thu May 7 23:17:13 UTC 2026 x86_64

//lib/firewalld/services/upnp-client.xml

 <?xml version="1.0" encoding="utf-8"?>
<service>
  <short>UPnP Client</short>
  <description>Universal Plug and Play client for auto-configuration of network routers (use only in trusted zones).</description>
  <source-port port="1900" protocol="udp"/>
</service>