CentOS 7关闭firewalld启用iptables 开放端口

关闭firewalld

[root@centos ~]# systemctl stop firewalld
[root@centos ~]# systemctl disable firewalld
[root@centos ~]# systemctl status firewalld

2.开启iptables

首先安装iptables：

[root@centos ~]#yum install -y iptables-services
[root@centos ~]# systemctl enable iptables
ln -s '/usr/lib/systemd/system/iptables.service' '/etc/systemd/system/basic.target.wants/iptables.service'

[root@centos ~]# systemctl start iptables
[root@centos ~]# systemctl status iptables
此时iptables的命令都可以使用了：

[root@centos ~]# iptables -L
Chain INPUT (policy ACCEPT)

target prot opt source destination

Chain FORWARD (policy ACCEPT)

target prot opt source destination

Chain OUTPUT (policy ACCEPT)

target prot opt source destination