3.8.13.5.12. Configure IP Address Masquerading
To check if IP masquerading is enabled, for example for the external zone, enter the following command as root:
~]# firewall-cmd --zone=external --query-masquerade && echo "enabled" || echo "Not enabled"If
zone is omitted, the default zone will be used.
To enable IP masquerading, enter the following command as root:
~]# firewall-cmd --zone=external --add-masqueradeTo make this setting permanent, add the
--permanent option and reload the firewall.
To disable IP masquerading, enter the following command as root:
~]# firewall-cmd --zone=external --remove-masquerade
To make this setting permanent, add the --permanent option and reload the firewall.
URL: https://docs-old.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/sec-Configure_IP_Address_Masquerading.html