It seems as though the AEBS will not forward packets from the internet to the LAN broadcast address (x.x.x.255)
and will also not allow you to setup a static ARP mapping. I have read that if you setup a port-forwarding rule
to forward your chosen UDP port number to your target host's IP address that it will work for a short while,
but soon the ARP entry for your host in the router's ARP cache expires and it will not work after that.
Some people say that it works for longer if you setup your host with a static DHCP address in the AEBS.
I found some threads involving AEBS and wake-over-Internet:
https://forums.macrumors.com/threads/537194/
http://forums.dealmac.com/read.php?4,2751524,older
http://www.macosxhints.com/article.php?story=20050118192723153
Unfortunately the AEBS doesn't support wake-over-Internet very well, it is the same story with a lot of routers.
This is why I am trying to compile a list of routers that people have had success with. For anyone else reading
this thread, there is a form on my website where you can report a router that you have got working with
wake-over-internet:
www.perculasoft.com/sleepover/report_router.php
When I get a list going I will put them up on my site for reference.
Sorry I don't have better news for you talazem, it is not a limitation of SleepOver, the app *is* sending the
magic packet but the AEBS just won't forward it to your machine in any reliable way.
gambcl