1.运行 crontab -e
2.添加命令
# 开启443端口
30 08 * * * firewall-cmd --zone=public --add-port=443/tcp --permanent
32 08 * * * systemctl restart firewalld.service
# 禁用443端口
30 18 * * * firewall-cmd --zone=public --remove-port=443/tcp --permanent
32 18 * * * systemctl restart firewalld.service
3.退出保存
4.关闭定时任务:service crond stop 5.重启定时任务:service crond start