CentOS7 firewall command changes:
CentOS7: systemctl status firewalld.service View firewall status
systemctl stop firewalld.service this visit turn off the firewall
systemctl disable firewalld.service from the next turn off the firewall
systemctl enable firewalld.service open the firewall
Finally, about the network configuration: systemctl restart network
CentOS6: service iptables status to view the status of the firewall
service iptables start temporarily open the firewall
service iptables stop temporarily turn off the firewall
chkconfig iptables --list view firewall boot state
chkconfig iptables on the firewall to open the boot
chkconfig iptables off the boot off the firewall