This reminds me that we used to use these network power switches: <a href="http:&#x2F;&#x2F;dataprobe.com&#x2F;iboot.html" rel="nofollow">http:&#x2F;&#x2F;dataprobe.com&#x2F;iboot.html</a><p>The problem with them is that they use just an 8051 microcontroller (talking to an ethernet controller over a parallel port)!  Arp and other broadcast background traffic on modern networks overwhelms them.