![]() In case with Remote Shutdown Wake-on-LAN packets, you should only allow receiving UDP packets from the machine running Remote Shutdown through the port specified on the WOL Configuration preference page. To protect your network from "smurf" attacks, you may allow only certain types of Directed Broadcasts to go throw the routers/gateways/switches (i.e. By sending a continuous stream of such requests, the attacker can create a much larger stream of replies, which can completely inundate the host whose address is being falsified. In a "smurf" attack, the attacker sends ICMP echo requests from a falsified source address to a directed broadcast address causing all the hosts in the target subnet to send replies to the falsified source. This ensures that the WOL packets are not blocked.Īllowing any type of Directed Broadcast on routers/gateways/switches makes the network vulnerable to "smurf" attacks though the Internet. You may wake up remote Machines from different subnets using Remote Shutdown with the help of each of the transmission methods (Directed Broadcast and Unicast), provided a specific set of requirements is met for at least one of the methods.ĭirected Broadcast transmission method prerequisitesĪll routers/gateways/switches between the Remote Shutdown site server and the target Machines must allow Directed Broadcasts and must support the IPv4 protocol. Prerequisites of Wake-on-LAN across different subnets (or VLANs) See the Configuring remote Machines' Network Adapter for details. If you want to wake the Machines up from Sleep or Hibernate, you must make some additional network adapter settings. For example, if the machine was switched off due to a power outage, WOL will not work. That means that the AC adapter should not be turned off after the last Shut Down. The target Machine must be in the Shut Down state. ![]() The Machines should use an ATX power supply meeting the ATX 2.01 specifications.PCI adapters send and receive PME signals via a PCI socket directly, without the need for a Wake-on-LAN cable. PCI version 2.2 supports PME (Power Management Events). Older motherboards must have a WAKEUP-LINK header onboard connected to the network adapter via a special 3-pin cable however, systems supporting the PCI 2.2 standard and having a PCI 2.2 compliant network adapter do not usually require a Wake-on-LAN cable as the required standby power is relayed through a PCI bus.See the Configuring remote Machines' Network Adapter for details on the network adapter configuration. The network adapters must support the standard Magic Packet format.See the Configuring Machines' hardware for Wake-on-LAN for details on the network adapter and BIOS configuration. The Machines must be configured to respond to wake-up packets received by the network adapter and in the Machine's BIOS.The following requirements should be met for the Wake-on-LAN operation to succeed:
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