I'm having an issue using Wake-on-LAN from the WAN, after everything has been configured correctly.
First of all, no problems waking up the PC from inside the LAN. Always works.
When it comes to WAN, it also works for me at first. But after a certain amount of time, let's say after 5 minutes have passed, it stops working, no matter how many WOL packets I try to send.
BTW, I'm using a wired interface (ethernet).