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WOL packet through firewalls?

Hope this ramble makes sense!

I have a netgear DG834G wireless ADSL router, which I have found to be very good so far. One thing I have been wanting to set up is WOL (wake-on-lan); this is easy enough when at home, on the LAN, but more tricky from outside i.e. across the Internet. Very useful when I am at work but just want to switch on my home PC to retrieve some information or a file etc, and saves leaving it on all day.

There are several web based tools e.g. http://www.depicus.com
which can submit the WOL packet for you over the internet.

Problem is, the WOL packet is supposed to be broadcast to your LAN and you can't forward broadcast over the internet(!)

However, you can send the packet direct to your routers Internet facing IP address (using a netmask of 255.255.255.255), and set up port forwarding to your machines IP that you want to wake up. Eureka! This works and the PC wakes up. BUT unfortunately it relies on the routers ARP cache record of your PC's MAC address, which only has a lifetime of not very long (maybe 10 minutes?). So, if the PC is off more than a certain amount of time, it will not be woken up.

Apparently, with some other routers you can set up port forwarding to as to send on to x.x.x.255 i.e. the LAN broadcast address. The netgear software only lets you go as high as x.x.x.254

So, does anyone out there know of a wireless ADSL router that will allow WOL through it in some way?

Or even better, I wonder if there is a way to tweak the netgear to get it to work?

Thanks,

Simon.
 
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