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Send WoL signal though Opnsense networks
(lemmy.ml)
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this post was submitted on 23 Apr 2024
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WoL packets are usually sent to the ip broadcast address for the network as they’re not ip based. I don’t know if this would ever work well across networks. Can you do send the wol packet from the opnsense router instead? Does it work then?
If you’re sending it to the IP of the server, it likely works soon after your turn the machine off because the ARP entry hasn’t timed out yet, but once it times out it won’t work anymore. The router doesn’t know how to get to the machine. You may be able to add a static arp mapping to get it to work long term.
Never heard of that phrase ARP thanks i will look into that
Update: I have installed the wol plugin from opnsense into my machine, you asked if i can send a wol packet though the router and so in my thinking i was able to do it via the plugin. The problem starts on the ARP, i found what it is and what it do but i dont know how i can insert the MAC address into the firewall rule that i created above, if you dont mind could you help me on how can i do it? And if i do that will i be able to send the wol signal though the Wlan or Wireguard in the future? Thanks
From a Linux command line it would be the command called arp, you need to add a static arp entry. I don’t know how that works on sense, but on Linux it would be something like
arp -s IP MACMaybe there’s a module in opnsense to help. The way I’ve done this before is using a machine connected to the same network at my target to wake up by logging into that machine and issuing the wake command.