# 开启防火墙 
systemctl start firewalld.service 

# 防火墙开机启动 
systemctl enable firewalld.service
 
# 关闭防火墙 
systemctl stop firewalld.service 

# 查看防火墙状态 
firewall-cmd --state 

# 查看现有的规则 
iptables -nL firewall-cmd --zone=public --list-ports 

# 重载防火墙配置 
firewall-cmd --reload 

# 添加单个单端口 
firewall-cmd --permanent --zone=public --add-port=81/tcp 

# 添加多个端口 
firewall-cmd --permanent --zone=public --add-port=8080-8083/tcp 

# 删除某个端口 
firewall-cmd --permanent --zone=public --remove-port=81/tcp 

# 针对某个 IP开放端口 
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.142.166" port protocol="tcp" port="6379" accept" firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.0.233" accept" 

# 删除某个
IP firewall-cmd --permanent --remove-rich-rule="rule family="ipv4" source address="192.168.1.51" accept" 

# 针对一个ip段访问 
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.0.0/16" accept" firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.1.0/24" port protocol="tcp" port="9200" accept" 

# 添加操作后别忘了执行重载 
firewall-cmd --reload