Current File : //usr/lib/firewalld/services/docker-swarm.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Docker integrated swarm mode</short>
  <description>Natively managed cluster of Docker Engines (>=1.12.0), where you deploy services.</description>
  <port port="2377" protocol="tcp"/>
  <port port="7946" protocol="tcp"/>
  <port port="7946" protocol="udp"/>
  <port port="4789" protocol="udp"/>
  <protocol value="esp"/>
</service>