Enable Wake-on-LAN persistent

This guide was tested on Ubuntu 22 and Debian 11/12.

Check current setting and enable manually

Firstly find out the interface on which WoL should be enabled. Therefore use ifconfig that is shipped with the net-tools-package on Debian/Ubuntu:

ifconfig

Your output may look like this:

enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.2 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::ed26:e33:5d38:2468 prefixlen 64 scopeid 0x20<link> ether xx:xx:xx:xx:xx:xx txqueuelen 1000 (Ethernet) RX packets 138808 bytes 178312866 (178.3 MB) RX errors 0 dropped 3324 overruns 0 frame 0 TX packets 70435 bytes 59140948 (59.1 MB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 [...] wlp2s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether xx:xx:xx:xx:xx:xx txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Then check the current Wake-on-LAN-state with ethtool. (Package to install has the same name):

sudo apt install ethtool
ethtool <interface>

Replace <interface> for examle with enp1s0, if this is the ID of your interface.

The output may now look like this:

Show/Hide

Settings for enp1s0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: No Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 1000Mb/s Duplex: Full Auto-negotiation: on master-slave cfg: preferred slave master-slave status: slave Port: Twisted Pair PHYAD: 0 Transceiver: external MDI-X: Unknown Supports Wake-on: pumbg Wake-on: d Link detected: yes

Important are the following lines:

[...] Supports Wake-on: pumbg Wake-on: d [...]

If the line Supports Wake-on: contains g, then Wake-on-LAN ist supported.

If the line Wake-on: already says Wake-on: g, then WoL is already enabled, if not, you can enable it with:

sudo ethtool -s <interface> wol g

Enable automatically at boot

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