1) 防火墙设置
# 查看防火墙状态
systemctl status firewalld
# 查看开机是否启动防火墙服务
systemctl is-enabled firewalld
# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
# 再次查看防火墙状态和开机防火墙是否启动