CentOS7, Firewalld and Docker

In the past, I always stop firewalld for Docker. But it's not secured. According to this, if we update firewalld version to 0.4.3.2-9 can fix this, or running these command:

• nmcli connection modify docker0 connection.zone trusted
• systemctl stop NetworkManager.service
• firewall-cmd --permanent --zone=trusted --change-interface=docker0
• systemctl start NetworkManager.service
• nmcli connection modify docker0 connection.zone trusted
• systemctl restart docker.service