IBM Support

Does TEM Wake-on-LAN require changing network configurations?

Technote (troubleshooting)


The TEM solution does NOT require that you modify your network configuration to utilize Wake-on-LAN technology.

Resolving the problem

Background Information

The ability to remotely power-on a computer using Wake-on-LAN is built into most computers by sending a specially formed "magic packet" to the computer over the network. However, powered-off computers will not retain their IP addresses and so in order to send the magic packet to the powered-off computer, you need to broadcast the magic packet to the whole subnet. Many network configurations only allow broadcast packets that originate from the local subnet for security reasons. In these configurations, only computers in the same subnet can wake-up a powered-off computer using Wake-on-LAN, which is often considered a huge problem for companies with many subnets because it is very difficult to use Wake-on-LAN from a central location.

TEM Wake-on-LAN

TEM technology allows companies to use Wake-on-LAN without changing their networking configurations by issuing Wake-on-LAN requests from computers in the same subnet. Since the TEM Agents are usually deployed to all computers in an organization, the TEM server can automatically identify which computers are available to issue the Wake-on-LAN packets that will not be blocked by the network. This system will work as long as there is at least one available computer in the subnet that has the agent installed (which can be enforced using TEM Last Man Standing technology).

By utilizing the TEM platform to intelligently figure out how to send the Wake-on-LAN packets, organizations can easily use Wake-on-LAN without needing to change their network configuration or open network security holes.

Historical Number


Document information

More support for: IBM BigFix family

Software version: Version Independent

Operating system(s): Platform Independent

Reference #: 1506078

Modified date: 13 September 2014