Mac wakes up for Ethernet network administrator access, goes to sleep again

Question

I'm running Mac OS X 10.4.6 on an iMac G5, and the OS is set up such that it presents a login prompt after the Mac is witched on from standby mode. If one does not start to type in a password, the machine goes back into standby mode after a dozen seconds or so, which is helpful e.g. in case I have hit the keyboard by accident.
However, there are situations when I don't want this to happen. For instance, I own a SqueezeBox v5 device, which will wake also the Mac when I turn it on via its remote control (I assume via "Wake for Ethernet network administrator access"). However, since I do type on the Mac keyboard in this case, but use the Squeezebox remote control instead, the Mac decides to turn itself off again. I'm also facing this with utilities that try to wake up my Mac at a certain time to perform their functions (e.g. with Audio Hijack Pro).
So my question is, is there any way to tell Mac OS X not to fall back into standby mode when woken up by another mechanism than normal keyboard typing, via some configuration file or similar. Turning off the keyword prompt entirely is not a tolerable option for me in this case.
Thanks for any help on this,
Christian
iMac G5 Mac OS X (10.4.6)
  Mac OS X (10.4.3)  

Answer 1

The 'wake for ethernet network administrator access' does not mean 'wake on any old ethernet traffic you like'.
In other words you can't just try to hit any service you choose - if the machine is asleep then it doesn't even have an IP address that's going to listen to your hit.
How it works is via a special broadcast protocol sent from another machine on the LAN. The packet is sent to the machine's hardware MAC address (and therefore doesn't need any services to be running on the machine). When the hardware detects the packet it wakes up the machine.
There are a few utilities that will send the relevant packets to wake a machine. Apple Remote Desktop has it, but so do free utilities like WakeOnLAN.