after 2-day test, have to say thanks to openwrt, every thing seems very easy on setting and configuration. install/configure openvpn on DDWRT is totally nightmare. I afraid I will stick with openwrt in future.
impressed by below functions:
but only one thing is unsuccessful: if want reboot daily, creat below command in schedule task in web-gui, but doesn't work, how to fix it
It is important to wait for more than one minute to advance the clock. Since OpenWrt will save the clock on shutdown and restore it on boot, it will be exactly 03:01 again after reboot, triggering the cronjob, rebooting again, ...