关闭防火墙🔥

1、关闭firewall：

  1. systemctl stop firewalld.service
  2. systemctl disable firewalld.service
  3. systemctl mask firewalld.service

2、安装iptables防火墙

  1. yum install iptables-services -y

3.启动设置防火墙

  1. # systemctl enable iptables
  2. # systemctl start iptables

4.查看防火墙状态

  1. systemctl status iptables

5.编辑防火墙，增加端口

  1. vi /etc/sysconfig/iptables #编辑防火墙配置文件
  2. -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
  3. -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
  4. -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

:wq! #保存退出

6.重启配置，重启系统

  1. systemctl restart iptables.service #重启防火墙使配置生效
  2. systemctl enable iptables.service #设置防火墙开机启动