I have configured my PC to turn it on by WOL and WOW (By DDNS). Both of them are working correctly, the problem is that if the PC remains off for a few hours, the WOW no longer works, but the WOL continues to work. But if I turn on the PC and turn it off, the WOW works again. Does anyone have any idea what might be going on? Thank you so much!
WOL and WOW does not work after a certain time
wake-on-lan
Best Answer
Okay here is my list of places where I look in order to get Wake-On-LAN working.
First off: WoL must be enabled in BIOS (ofc).
In windows: Check the settings for the network adapter and make sure "wake on magic packet" is enabled.
When you shut down your computer it also matter if it is shutting down in S3 (sleep mode), S4 (hibernate) or S5 (soft power off mode).
According to Microsoft WoL only works with S3 or S4. It does not work with
fast startup
or soft shut off (S5).Now in theory a WoL packet has to be sent to the subnet broadcast address (like 192.168.1.255) and have the following content:
Spaces added for readability.
... but it has been my experience, that you sometimes have to use the host ip address instead - and still use MAC address inside the data packet.
And last setting try is to sent the packet to destination UDP port 7 or alternatively UDP port 9.
My experience is that it varies which combination works.
So to recap all these conditions has to be double checked:
Magic packet
enabled on network adapter in Windows.All in all quite few places to stumble in order to get WoL to work.