[vortex] Configuration + Tool to wake up the PC over the WAN, connected via DSL + Router

[hb)]

Hi all,

I needed a solution/tool to wake up my PC remotely, which is connected to the 
WAN via an always-on router an a DSL modem. 

With wich tool I can wake up my pc. As I understand I need to hand over 
IP-Adress and Mac Adress, which I can't do with 'etherwake'!

Do I have to think about special configuration options for the router.

In the LAN-Area the WOL process works without any problem.

Thanks for any help,
greets hb