Fedora open / close port

/etc/firewalld/services/my-service.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>My service</short>
  <description>This option allows My service to use tcp port 12345</description>
  <port protocol="tcp" port="12345"/>
</service>

firewall-cmd --permanent --add-service=my-service
firewall-cmd --reload

firewall-cmd --list-services