如果需要外界连接,记得在防火墙开放端口
    vim /etc/sysconfig/iptables
    防火墙的重启
    service iptables restart
    关闭
    service iptables stop
    查看状态
    service iptables status
    禁止防火墙关机自启动
    chkconfig iptables off 或 on chkconfig iptables —list 查看自启动状态列表

    检查防火墙是否开启:
    firewall-cmd —state
    开启防火墙:
    systemctl start firewalld

    防火墙开启8080端口
    firewall-cmd —zone=public —add-port=8080/tcp —permanent
    重启防火墙:
    firewall-cmd —reload
    查看8080端口是否添加成功
    firewall-cmd —zone=public —query-port=8080/tcp

    //开启端口 firewall-cmd —zone=public —add-port=11111/tcp —permanent //查询端口号11111是否开启: firewall-cmd —query-port=11111/tcp //重启防火墙: firewall-cmd —reload //查询有哪些端口是开启的: firewall-cmd —list-port //禁用端口 firewall-cmd —zone=public —remove-port=11111/tcp —permanent