Product SiteDocumentation Site Configure the default zone by Editing the firewalld Configuration File
As root, open /etc/firewalld/firewalld.conf and edit the file as follows:
 # default zone
 # The default zone used if an empty zone string is used.
 # Default: public
Reload the firewall, by entering the following command as root:
~]# firewall-cmd --reload
This will reload the firewall without losing state information (TCP sessions will not be interrupted).