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With the Z-Cron command REMOTE-SHUTDOWN and the command WAKEONLAN, computers in a local network can be switched on and off on schedule.
WOL - WAKE ON LAN - Scheduled
System requirements
To use Wake on LAN both the motherboard and the network adapter have to support ACPI. While the computer is turned off, the NIC will continue to receive power from the standby branch of the power supply. It listens to the network traffic and as soon as it receives a special "magic packet" it sends a wakeup signal to the
mainboard which then switches on the computer.
Windows configuration
On the computer you want to wake up, you have to go to the Windows device manager, open the info window for the network adapter, then "power management" and set the two check boxes "Allow this device to bring the computer out of standby" and "Only allow management stations to bring the computer out of standby".
Hardware configuration
Energy On by ring or Wake on LAN must be activated in the BIOS. Sometimes a special WOL cable also must be put between network interface card and mainboard in some (older) network interface cards. Please consult the manuals of the network interface card and the mainboard for instructions on how to configure your hardware.
Z-Cron command WAKEONLAN - WOL
WAKEONLAN makes it possible to switch on a computer in the local network with a network command. The MAC address has to be typed in without hyphens or colons.
e.g. 00-14-85-B4 E3-D7 has to be typed in as 001485B4E3D7.
Default value of broadcast address (255.255.255.255) won't work across subnets. The wakeup packets are not addressed to the client specific IP address is because most routers will drop the client from their tables if the machine has been off for a period of time. Once that happens, explicitly addressed packets would be dropped at the router, but broadcasts to a specific segment will always get there. If all machines on subnet is down router will drop all packets.
Scheduler Freeware
Z-Cron is an ideal extension to my Z-DATdump program. Z-Cron is Freeware for private use which means that it runs on workstations (Windows 2000, XP, Vista and 7) without limitations and it can be installed on servers (NT/2000/2003/2008) for testing purposes. The freeware version is limited to a trial period of 14 days on a Windows Server„ operating system! For commercial use or use on a Windows Server™ a server license is required!
This free Z-Cron version is exclusively intended for personal use on a single PC (workstation). Copying and redistribution of the complete program package is allowed for personal use only.
Commercial or professional use of this Z-Cron freeware version is not allowed! For commercial use you have to buy a license!
 Z-Cron license for companies
Z-Cron license for private individuals
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Download freeware version Z-Cron