Given the large number of enterprise production environments are still using Centos 6, Centos 7 firewall control commands and related issues with memory
| Firewall | centos7 | centos6 |
|---|---|---|
| status | systemctl status firewalld.service | service iptable status |
| shut down | systemctl stop firewalld.service | servcie iptables stop |
| Never start | systemctl disable firewalld.service | chkconfig iptables off |
| Restart | firewall-cmd --reload | iptables:service iptables restart |
| Open ports | firewall-cmd --zone=public --add-port=80/tcp --permanent | vi /etc/sysconfig/iptables -A RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT |