Like every other website on the planet, SmallNetBuilder uses cookies. Our cookies track login status, but we only allow admins to log in anyway, so those don't apply to you. Any other cookies you pick up during your visit come from advertisers, which we don't control.
If you continue to use the site, you agree to tolerate our use of cookies. Thank you!

Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

LAN & WAN How To

Step 6 - Configure port forwarding

Configuring port forwarding on your router is a required change; WOL won't work without it.

WOL uses UDP as its Layer 4 transport, but the port varies based on the utility. The mc-wol.exe utility uses UDP port 65535. AMD's Magic Packet Utility uses UDP port 2304. There is a Linux tool, aptly named wakeonlan, that uses UDP port 9.

An easy way to find the port is to use a packet sniffer utility to see which port is used. Ethereal (now Wireshark) is probably the best known, and a very powerful free download. If you're into networking, it is an invaluable troubleshooting tool. You may find this tool comes in handy if you're using a different WOL utility and need to find the port number.

Figure 6 below is the Wireshark capture of a WOL packet. The areas titled MAC ADDRESS and IP Address are blanked out in the example, because you'll see your own MAC and IP addresses when you run it. The key is the Dst Port (Destination Port). This is what you're looking for.

Wireshark's packet capture

Figure 6: Wireshark's packet capture showing the destination port

Once you have the port number, you have what you need. You'll need to go into your router's port forwarding menu and set up a rule to forward UDP packets sent to the WOL port to the broadcast IP address of your LAN.

Some routers don't allow broadcast IPs to be used as a target IP. This is where having Static DHCP comes in handy. If you have configured Static DHCP, and your router has the MAC of your target PC, you can configure your router to forward the WOL packet directly to the IP address of the target PC.

Figure 7 below is a screenshot from a Linksys RV042 router. Port forwarding is configured in the Setup menu under the Forwarding tab.

Linksys port forwarding

Figure 7: Setting up port forwarding on a Linksys RV042 router

Figure 8 below is a screenshot from a Zyxel P-334WT router with several port forwarding rules configured. Port forwarding is configured in the Network menu under the NAT-Port Forwarding tab.

Zyxel port forwarding

Figure 8: Setting up port forwarding on a Zyxel P-334WT router

More LAN & WAN

Wi-Fi System Tools
Check out our Wi-Fi System Charts, Ranker and Finder!

Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

Hello, I'm looking for advice for the build in the subject line. I'm a landscape architect starting my own small office. It will be two people at firs...
Device: RT-N66UFirmware: 380.69Hello everyone,i attached a tp-link access point to my router and created vlans for several SSIDs.In addition i would l...
For those running Win 10 Defender , did you know that you can run Defender sandboxed?https://fossbytes.com/sandbox-windows-10-defender-enable/Windows ...
Hi,I want to assign my virtual machines to a certain dhcp range.I have been playing around with dnsmasq.conf.add but cant get it to work.This is what ...
Hi allIt seems that devices on 5G-1 and 5G-2 cannot "see" each other.On Wireshark it seems some packets can't traverse from one 5G band to the other. ...

Don't Miss These

  • 1
  • 2
  • 3