防火墙（FireWall）

#centos7查看防火墙所有信息
firewall-cmd --list-all
#centos7查看防火墙开放的端口信息
firewall-cmd --list-ports


#centos7启动防火墙
systemctl start firewalld.service
#centos7停止防火墙/关闭防火墙
systemctl stop firewalld.service
#centos7重启防火墙
systemctl restart firewalld.service
 
 
#设置开机启用防火墙
systemctl enable firewalld.service
#设置开机不启动防火墙
systemctl disable firewalld.service


firewall-cmd --zone=public --add-port=80/tcp --permanent
 
firewall-cmd --zone=public --remove-port=80/tcp --permanent

firewall-cmd --state