防火墙

安装Firewall命令：

yum install firewalld firewalld-config

Firewall开启常见端口命令：

firewall-cmd -–zone=public -–add-port=80/tcp -–permanent
firewall-cmd -–zone=public -–add-port=443/tcp --permanent
firewall-cmd –-zone=public –-add-port=22/tcp –-permanent
firewall-cmd –-zone=public –-add-port=21/tcp –-permanent
firewall-cmd –-zone=public –-add-port=53/udp –-permanent

Firewall关闭常见端口命令：

firewall-cmd –-zone=public –-remove-port=80/tcp –-permanent
firewall-cmd –-zone=public –-remove-port=443/tcp –-permanent
firewall-cmd –-zone=public –-remove-port=22/tcp –-permanent
firewall-cmd –-zone=public –-remove-port=21/tcp –-permanent
firewall-cmd –-zone=public –-remove-port=53/udp –-permanent

批量添加区间端口

firewall-cmd –-zone=public –-add-port=4400-4600/udp –-permanent
firewall-cmd –-zone=public –-add-port=4400-4600/tcp –-permanent

开启防火墙命令：

systemctl start firewalld

重启防火墙命令：

firewall-cmd --reload 或者 service firewalld restart

查看端口列表：

firewall-cmd --permanent --list-port

禁用防火墙

systemctl stop firewalld

设置开机启动

systemctl enable firewalld

停止并禁用开机启动

systemctl disable firewalld

查看状态

systemctl status firewalld或者 firewall-cmd --state