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Wake-On-LAN Wake-On-LAN functionality sends the Magic Packet frames to targets that support Wake-On-LAN (WOL) technology and then turn on computers remotely. With this feature, you can easily turn on your individual PC or the PCs that located on LAN, another subnet or even WAN. Also you can schedule a WOL task to run at specified time only once or periodically. From version 1.45 on, a service for Wake-On-LAN was available, meaning that you can schedule Wake-On-LAN tasks without logon into Windows. From v1.50 on, you can perform Wake-On-LAN from the command line, meaning that tasks can also be scheduled with other schedule programs such as Windows Tasks Scheduler, etc.  Wake-On-LAN functionality requires three types of data: computer name, IP broadcast address, MAC address. These data come from the main window, and also can be manually added one by one or imported all in the Wake-On-LAN dialog. At first the IP broadcast address is automatically set to "255.255.255.255", which is called limited broadcast address that only reaches nodes on LAN. If the targets are located on other subnet, you should set it to a directed broadcast address or unicast address. For example, specify directed broadcast address 192.168.10.255 to reach all nodes on the 192.168.10.x subnet. IP address or DNS name are also applicable but you should be careful to use, except that you are aware how to make the Magic Packet frames reach the target computers under these environments. For example, "192.168.10.255" is a directed broadcast address, "121.47.135.23" and "amachine.aplace.com" are unicast addresses. Sometimes it may be very different to get MAC addresses of computers through scan approach, as computers may be protected by firewall programs. In LanHelper, just click the label "Get MAC Address from Router, Switch or Modem" from the Wake-On-LAN dialog and you then can obtain MAC addresses from the router, switch or modem, if those devices support SNMP MIB-2 and have an IP address. Generally the gateway is a good place to read MAC addresses from. The results include off-line computers' data which saved in the device's cache. Wake-On-LAN schedule is supported. You can schedule at most 16 tasks in LanHelper. The tasks will be stopped when LanHelper is closed. To schedule tasks without LanHelper or before logon into Windows, the Wake-On-LAN service is recommended. You can install or uninstall the service, start or stop it from the Wake-On-LAN dialog. while the service is running, a new WOL task can be directly submit into the service, and all performance results will be logged to Windows event log. LanHelper provides command line mode support for WOL feature, meaning that you can schedule WOL tasks with other more powerful scheduler programs. A remote computer must meet some expectations so Wake-On-LAN can work. The motherboard and network adapter of the remote computer both support WOL technology, and connect a 3-pin power cable from network adapter to motherboard WOL connector (This step can be skipped if the motherboard is equipped with PCI 2.2 compliant bus). The Wake-On-LAN option in motherboard BIOS setup must be enabled, for Award BIOS checking the Power Management Setup for this option. The ATX power supply provides at least 600mA standby current. However, Wake-On-LAN may fail if the target computer was shut down improperly or hibernated last time. The reason is that some network cards require a flag to be set, which only happens when the operating system properly power down the computer. How to turn on remote computers across subnet via Wake-On-LAN 
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