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Windows pc calling home (even while asleep)
(lemmy.dbzer0.com)
I have a network-wide pi hole and I noticed that it requested activity.windows.com, a url blocked by my pi hole, even while my pc is suspended. I pinged 10.0.0.217 and it is currently unreachable. So, somehow, windows pc’s turn on networking, phones home, and turns off even while suspended.
Creepy behavior
Is this machine by any chance a recent laptop?
Newer laptops with Intel cpu (not sure about AMD) don't have a real sleep mode anymore. Instead, they have a mode where, besides the ram, the cpu and the network device are also kept alive for communication.
In theory, this means that when you wake up your device all of your apps and stuff will already be updated with the latest information from the web with little battery loss. In practice, it just overheats your laptop while in your backpack and kills the battery.
The ping you see while it is "sleeping" might be from this.
Same for most AMD laptops as well.