防火墙常用命令
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：
W
**重启防火墙命令：**
firewall-cmd –reload 或者 service firewalld restart
查看放行端口：
firewall-cmd --list-ports
**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**
sytemctl disable firewalld
**查看状态**
systemctl status firewalld或者 firewall-cmd –state