Port forwarding to broadcast address

[jparnell]

Hi,
I am trying to set up one of my computers so that it wakes up when it receives a magic packet from the internet, and then i can use remote desktop. I have so far been able to do this from within my LAN. The problem has come when i try to do it from the internet.

I need to be able to forward all traffic destined for my network on UDP port 9 to the broadcast address so that ALL computers will receive it (even when they are off) and respond if the MAC address is correct. Unfortunatly, my router (an SMC 7004ABR) wont allow me to forward to the broadcast address (it restricts values entered to 1-254) does anyone have any hints or tips as to how i could get WOL to work from the internet?

James

 

[Praetor]

Is this what you are looking for?

 

[howdyduty]

If you router will allow a smaller subnet than a 24 bit net, you could then have a few choices of broadcast addresses between 1-254. For example, a 26 bit subnet with a mask of 255.255.255.192 would have a broadcase address of xxx.xxx.xxx.63

Can use the IPcalc at http://jodies.de/ipcalc

 

[jparnell]

Thats quite useful thank you because it helps me to understand how the packets are made up.
I'm still not sure if theres a way to forward the packet from the internet to the broadcast address of of my network.
Howdyduty...I cant find any setting to change the subnet. Maybe this whole idea is technically not possible with my router?
Does anyone else have any ideas?

Thank you

 

[spidey07]

If you can't enter .255 in the address and your subnet mask is 255.255.255.0 then it isn't a broadcast.

so, try using a 255.255.255.128 mask on your router and then enter x.x.x.127 for the forward address. where x.x.x is the first three numbers of your internal address.

 

[jparnell]

Unfortunatly, my router wont allow me to change the subnet mask.
I'm now realising the SMC 7004ABR isnt very versatile!