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Note I had wake-on-lan working on an older kernel but after an upgrade, it now fails to wake up the machine.

I read in a forum to open a terminal and enter journalctl -f on the machine to wake up and enter wakeonlan <mac_address> on a different machine. (If I listen with nc -ul -p 9 I do receive the magic packet.)

Q1 Should there be any observable output from wakeonlan in the journal?

Q2 Is there some kind of dry run to troubleshoot wake-on-lan problems?

  • The magic packet is typically sent as a UDP datagram to port 0,7 or 9, or directly over Ethernet as EtherType 0x0842. Maybe you will have to permit inbound traffic to UDP 7,9 on you target host. – cmak.fr Jun 07 '19 at 07:29
  • @cmak.fr As I mentioned in the parenthesis above, I'm able to observe the magic-packet when the target machine is on and I listen with nc. – participant Jun 07 '19 at 07:56

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