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File: //lib/firewalld/services/dds.xml
<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>OMG DDS</short>
  <description>Open Management Group (OMG) Data Distribution Service (DDS) is protocol supporting various applications. It is usally found in control systems. This is the unicast and multicast service for domains with ID 0 through 10 and maximal possible applications (120). Please see https://community.rti.com/content/forum-topic/statically-configure-firewall-let-omg-dds-traffic-through for details.</description>
  <include service="dds-multicast"/>
  <include service="dds-unicast"/>
</service>