RHLE7(CentOS7)巨大变动之firewalld取代iptables
Fedora 18 introduced firewalld as a replacement for the previous iptables service. Since RHEL7 and Oracle Linux 7 are based on Fedora 19, the switch from iptables service to firewalld is now part of the Enterprise Linux distributions. This article is a rework of the previous Linux Firewall article, bringing it up to date.