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/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>