For my small "server" in the loft, I want to try and save some power. 99% of the time, it's idling so might as well put it into standby for the rest of the time.

Now I know I could use hibernate or shutdown and WOL, but I'd prefer standby because:

there's the option for the PC to resume operation without having to use WOL packets. The problem is that it resumes pretty much as soon as it's gone into standby so I guess there's some traffic on my home network that's waking the PC up. But I can't figure out what.

So my next step is to check stuff with wireshark. But in the meantime, does anyone know what kind of traffic is sufficient for the PC to wake up from standby?

Or is there some other application / driver / something I could use to control how the PC is woken up. Ideally, I'd like to not have to resort to a magic packet / WOL because it limits what hardware can wake it up.

Sorry for my ramblings. Hopefully it makes sense...