How to enable/start and disable/stop Firewall in LINUX 6.3 and LINUX 7.0

Step 1: check the status using this command in LINUX 6.3 :
service iptables status

Step 2:  Command to start the Firewall in LINUX 6.3 :
service iptables start

Step 2:  Command to stop the Firewall in LINUX 6.3 :
service iptables stop

             
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Step 1: check the status using this command in LINUX 7.0 :
                                                  systemctl status firewalld -l

Step 2:  Command to start the Firewall in LINUX 7.0:
systemctl start firewalld -l


Step 2:  Command to stop the Firewall in LINUX 7.0:
systemctl stop firewalld -l