/usr/lib/firewalld/zones/ Current File: //usr/lib/firewalld/zones/external.xml

<?xml version="1.0" encoding="utf-8"?>
<zone>
  <short>External</short>
  <description>For use on external networks. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description>
  <service name="ssh"/>
  <masquerade/>
</zone>